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the.root
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Joined: 29 Apr 2007
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PostPosted: Wed Jul 23, 2014 2:10 am    Post subject: md doesn't autoassemble at boot Reply with quote

So I built a NAS box about a year ago and I've had this problem since then. I have 6 arrays, 4 are 0.90 for the system, 2 of them are ver 1.2 for the storage partitions. The 4 that are 0.90 get auto assembled and started correctly on boot everytime. The 2 that are 1.2 fail to assemble/start on boot. I don't need them to boot, but they are part of fstab and should be mounted in that process. I'm not sure if this is a limitation of 1.2, I know that 1.2 can't autoassemble in the kernel for booting off of, but AFAIK since it isn't a system drive it should be no problem. The weird thing is about 1 in 5 times I reboot this system - it starts it no problem. It's completely random if it does not. I only really reboot this when theres a power outage so I've just kind of ignored it but I'm wondering if there's something simple I missed.

/dev/md20 has 4 drives/partitions in a raid10: sdm1, sdn1, sdo1, sdp1
/dev/md10 has 8 drives/partitions in a raid10: sde1, sdl1, sdk1, sdj1, sdi1, sdh1, sdg1, sdf1

issue shown with mdstat when booting up:
Code:

aries ~ # cat /proc/mdstat
Personalities : [raid0] [raid1] [raid10]
md20 : inactive sdm1[1](S) sdo1[4](S) sdp1[3](S)
      5860537558 blocks super 1.2
       
md10 : inactive sdl1[7](S) sdk1[6](S)
      5860529039 blocks super 1.2
       
md2 : active raid1 sdb2[1] sda2[0]
      47185856 blocks [2/2] [UU]
     
md3 : active raid1 sdb3[1] sda3[0]
      89128896 blocks [2/2] [UU]
                                                                                                   
md4 : active raid1 sdb4[1] sda4[0]                                                                 
      15728576 blocks [2/2] [UU]                                                                   
                                                                                                   
md5 : active raid1 sdb5[1] sda5[0]                                                                 
      3990272 blocks [2/2] [UU]                                                                   
                                                                                                   
unused devices: <none>   


to fix i simply :
Code:

aries ~ # mdadm --stop /dev/md10                                                                   
mdadm: stopped /dev/md10                                                                           
aries ~ # mdadm --stop /dev/md20
mdadm: stopped /dev/md20                                                                           
aries ~ # mdadm --assemble --scan
mdadm: /dev/md10 has been started with 8 drives.                                                   
mdadm: /dev/md20 has been started with 4 drives.


and they start/assemble with no issues correctly everytime.
Code:

aries ~ # cat /proc/mdstat
Personalities : [raid0] [raid1] [raid10]                                                           
md20 : active raid10 sdn1[0] sdp1[3] sdo1[4] sdm1[1]                                               
      3907023872 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]                           
                                                                                                   
md10 : active raid10 sde1[0] sdl1[7] sdk1[6] sdj1[5] sdi1[4] sdh1[3] sdg1[2] sdf1[1]               
      11721056256 blocks super 1.2 512K chunks 2 near-copies [8/8] [UUUUUUUU]                     
                                                                                                   
md2 : active raid1 sdb2[1] sda2[0]                                                                 
      47185856 blocks [2/2] [UU]                                                                   
                                                                                                   
md3 : active raid1 sdb3[1] sda3[0]                                                                 
      89128896 blocks [2/2] [UU]                                                                   
                                                                                                   
md4 : active raid1 sdb4[1] sda4[0]                                                                 
      15728576 blocks [2/2] [UU]                                                                   
                                                                                                   
md5 : active raid1 sdb5[1] sda5[0]                                                                 
      3990272 blocks [2/2] [UU]                                                                   
                                                                                                   
unused devices: <none>                                 


mdadm and mdraid init scripts are in boot (also tried default). Also like I said it works randomly maybe 1 in 5x they'll mount correctly at boot.

my fstab options:
Code:

/dev/md10               /storage/media  ext4            defaults        0 1
/dev/md20               /storage/vm     ext4            defaults        0 1


my mdadm.conf:
Code:

aries ~ # cat /etc/mdadm.conf
ARRAY /dev/md5 metadata=0.90 UUID=54d952a1:c0a40498:cb201669:f728008a
ARRAY /dev/md4 metadata=0.90 UUID=364ad11a:e4d1bb94:cb201669:f728008a
ARRAY /dev/md3 metadata=0.90 UUID=2d3128d1:c69d7330:cb201669:f728008a
ARRAY /dev/md2 metadata=0.90 UUID=0d593bc2:e6f1e1d4:cb201669:f728008a
ARRAY /dev/md10 metadata=1.2 name=aries:10 UUID=bb1a4b70:b157d96a:f5b34d92:9e20e32c devices=/dev/sdi1,/dev/sdl1,/dev/sdk1,/dev/sdj1,/dev/sdh1,/dev/sdg1,/dev/sdf1,/dev/sde1
ARRAY /dev/md20 metadata=1.2 name=aries:20 UUID=7899af74:d22da93a:63d867aa:b25fe1a6 devices=/dev/sdn1,/dev/sdp1,/dev/sdo1,/dev/sdm1
MAILADDR xxx@gmail.com

Also I've tried not including the devices= options, deleting the entries, putting them in different order - no luck.

mdadm details:
Code:

aries ~ # mdadm --detail /dev/md10
/dev/md10:
        Version : 1.2
  Creation Time : Sat Jan 19 02:57:53 2013
     Raid Level : raid10
     Array Size : 11721056256 (11178.07 GiB 12002.36 GB)
  Used Dev Size : 2930264064 (2794.52 GiB 3000.59 GB)
   Raid Devices : 8
  Total Devices : 8
    Persistence : Superblock is persistent

    Update Time : Tue Jul 22 23:44:18 2014
          State : clean
 Active Devices : 8
Working Devices : 8
 Failed Devices : 0
  Spare Devices : 0

         Layout : near=2
     Chunk Size : 512K

           Name : aries:10  (local to host aries)
           UUID : bb1a4b70:b157d96a:f5b34d92:9e20e32c
         Events : 49

    Number   Major   Minor   RaidDevice State
       0       8       65        0      active sync   /dev/sde1
       1       8       81        1      active sync   /dev/sdf1
       2       8       97        2      active sync   /dev/sdg1
       3       8      113        3      active sync   /dev/sdh1
       4       8      129        4      active sync   /dev/sdi1
       5       8      145        5      active sync   /dev/sdj1
       6       8      161        6      active sync   /dev/sdk1
       7       8      177        7      active sync   /dev/sdl1
aries ~ # mdadm --detail /dev/md20
/dev/md20:
        Version : 1.2
  Creation Time : Thu Nov 21 01:01:32 2013
     Raid Level : raid10
     Array Size : 3907023872 (3726.03 GiB 4000.79 GB)
  Used Dev Size : 1953511936 (1863.01 GiB 2000.40 GB)
   Raid Devices : 4
  Total Devices : 4
    Persistence : Superblock is persistent

    Update Time : Wed Jul 23 00:01:21 2014
          State : clean
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

         Layout : near=2
     Chunk Size : 512K

           Name : aries:20  (local to host aries)
           UUID : 7899af74:d22da93a:63d867aa:b25fe1a6
         Events : 44417

    Number   Major   Minor   RaidDevice State
       0       8      209        0      active sync   /dev/sdn1
       1       8      193        1      active sync   /dev/sdm1
       4       8      225        2      active sync   /dev/sdo1
       3       8      241        3      active sync   /dev/sdp1


my messages :
Code:

aries ~ # tail -2000 /var/log/messages  |grep -i 'md:'
Jul 22 21:42:16 aries kernel: [    0.000000] md: Will configure md2 (super-block) from /dev/sda2,/dev/sdb2, below.
Jul 22 21:42:16 aries kernel: [    1.087690] md: raid0 personality registered for level 0
Jul 22 21:42:16 aries kernel: [    1.087690] md: raid1 personality registered for level 1
Jul 22 21:42:16 aries kernel: [    1.087691] md: raid10 personality registered for level 10
Jul 22 21:42:16 aries kernel: [    2.925531] md: Waiting for all devices to be available before autodetect
Jul 22 21:42:16 aries kernel: [    2.925920] md: If you don't use raid, use raid=noautodetect
Jul 22 21:42:16 aries kernel: [    2.926524] md: Autodetecting RAID arrays.
Jul 22 21:42:16 aries kernel: [    2.936883] md: invalid raid superblock magic on sdd1
Jul 22 21:42:16 aries kernel: [    2.937282] md: sdd1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    2.944942] md: invalid raid superblock magic on sdd2
Jul 22 21:42:16 aries kernel: [    2.945343] md: sdd2 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    2.972626] md: invalid raid superblock magic on sdd3
Jul 22 21:42:16 aries kernel: [    2.973030] md: sdd3 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.123772] md: invalid raid superblock magic on sdc1
Jul 22 21:42:16 aries kernel: [    3.124175] md: sdc1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.127546] md: invalid raid superblock magic on sdc2
Jul 22 21:42:16 aries kernel: [    3.127943] md: sdc2 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.158862] md: invalid raid superblock magic on sdc3
Jul 22 21:42:16 aries kernel: [    3.159229] md: sdc3 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.167200] md: invalid raid superblock magic on sdg1
Jul 22 21:42:16 aries kernel: [    3.167597] md: sdg1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.180187] md: invalid raid superblock magic on sdh1
Jul 22 21:42:16 aries kernel: [    3.180581] md: sdh1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.181056] md: invalid raid superblock magic on sde1
Jul 22 21:42:16 aries kernel: [    3.181449] md: sde1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.181908] md: invalid raid superblock magic on sdf1
Jul 22 21:42:16 aries kernel: [    3.182259] md: sdf1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.182723] md: invalid raid superblock magic on sdi1
Jul 22 21:42:16 aries kernel: [    3.183105] md: sdi1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.183561] md: invalid raid superblock magic on sdk1
Jul 22 21:42:16 aries kernel: [    3.183941] md: sdk1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.184374] md: invalid raid superblock magic on sdl1
Jul 22 21:42:16 aries kernel: [    3.184754] md: sdl1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.185226] md: invalid raid superblock magic on sdj1
Jul 22 21:42:16 aries kernel: [    3.185606] md: sdj1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.186090] md: invalid raid superblock magic on sdm1
Jul 22 21:42:16 aries kernel: [    3.186469] md: sdm1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.186952] md: invalid raid superblock magic on sdn1
Jul 22 21:42:16 aries kernel: [    3.187308] md: sdn1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.187798] md: invalid raid superblock magic on sdo1
Jul 22 21:42:16 aries kernel: [    3.188182] md: sdo1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.188665] md: invalid raid superblock magic on sdp1
Jul 22 21:42:16 aries kernel: [    3.189045] md: sdp1 does not have a valid v0.90 superblock, not importing!
Jul 22 21:42:16 aries kernel: [    3.189444] md: Scanned 26 and added 8 devices.
Jul 22 21:42:16 aries kernel: [    3.189821] md: autorun ...
Jul 22 21:42:16 aries kernel: [    3.190164] md: considering sdb5 ...
Jul 22 21:42:16 aries kernel: [    3.190539] md:  adding sdb5 ...
Jul 22 21:42:16 aries kernel: [    3.190912] md: sdb4 has different UUID to sdb5
Jul 22 21:42:16 aries kernel: [    3.191260] md: sdb3 has different UUID to sdb5
Jul 22 21:42:16 aries kernel: [    3.191638] md: sdb2 has different UUID to sdb5
Jul 22 21:42:16 aries kernel: [    3.192016] md:  adding sda5 ...
Jul 22 21:42:16 aries kernel: [    3.192360] md: sda4 has different UUID to sdb5
Jul 22 21:42:16 aries kernel: [    3.192738] md: sda3 has different UUID to sdb5
Jul 22 21:42:16 aries kernel: [    3.193119] md: sda2 has different UUID to sdb5
Jul 22 21:42:16 aries kernel: [    3.193732] md: created md5
Jul 22 21:42:16 aries kernel: [    3.194118] md: bind<sda5>
Jul 22 21:42:16 aries kernel: [    3.194463] md: bind<sdb5>
Jul 22 21:42:16 aries kernel: [    3.194854] md: running: <sdb5><sda5>
Jul 22 21:42:16 aries kernel: [    3.196419] md: considering sdb4 ...
Jul 22 21:42:16 aries kernel: [    3.196770] md:  adding sdb4 ...
Jul 22 21:42:16 aries kernel: [    3.197137] md: sdb3 has different UUID to sdb4
Jul 22 21:42:16 aries kernel: [    3.197530] md: sdb2 has different UUID to sdb4
Jul 22 21:42:16 aries kernel: [    3.197908] md:  adding sda4 ...
Jul 22 21:42:16 aries kernel: [    3.198259] md: sda3 has different UUID to sdb4
Jul 22 21:42:16 aries kernel: [    3.198618] md: sda2 has different UUID to sdb4
Jul 22 21:42:16 aries kernel: [    3.199224] md: created md4
Jul 22 21:42:16 aries kernel: [    3.199610] md: bind<sda4>
Jul 22 21:42:16 aries kernel: [    3.199986] md: bind<sdb4>
Jul 22 21:42:16 aries kernel: [    3.200332] md: running: <sdb4><sda4>
Jul 22 21:42:16 aries kernel: [    3.201964] md: considering sdb3 ...
Jul 22 21:42:16 aries kernel: [    3.202320] md:  adding sdb3 ...
Jul 22 21:42:16 aries kernel: [    3.202667] md: sdb2 has different UUID to sdb3
Jul 22 21:42:16 aries kernel: [    3.203046] md:  adding sda3 ...
Jul 22 21:42:16 aries kernel: [    3.203391] md: sda2 has different UUID to sdb3
Jul 22 21:42:16 aries kernel: [    3.203983] md: created md3
Jul 22 21:42:16 aries kernel: [    3.204331] md: bind<sda3>
Jul 22 21:42:16 aries kernel: [    3.204707] md: bind<sdb3>
Jul 22 21:42:16 aries kernel: [    3.205087] md: running: <sdb3><sda3>
Jul 22 21:42:16 aries kernel: [    3.206742] md: considering sdb2 ...
Jul 22 21:42:16 aries kernel: [    3.207099] md:  adding sdb2 ...
Jul 22 21:42:16 aries kernel: [    3.207442] md:  adding sda2 ...
Jul 22 21:42:16 aries kernel: [    3.208009] md: created md2
Jul 22 21:42:16 aries kernel: [    3.208356] md: bind<sda2>
Jul 22 21:42:16 aries kernel: [    3.208731] md: bind<sdb2>
Jul 22 21:42:16 aries kernel: [    3.209107] md: running: <sdb2><sda2>
Jul 22 21:42:16 aries kernel: [    3.210758] md: ... autorun DONE.
Jul 22 21:42:16 aries kernel: [    3.211153] md: Loading md2: /dev/sda2
Jul 22 21:42:16 aries kernel: [    3.230853] md: couldn't update array info. -22
Jul 22 21:42:16 aries kernel: [    3.231250] md: could not open unknown-block(8,2).
Jul 22 21:42:16 aries kernel: [    3.231629] md: md_import_device returned -16
Jul 22 21:42:16 aries kernel: [    3.232013] md: could not open unknown-block(8,18).
Jul 22 21:42:16 aries kernel: [    3.232366] md: md_import_device returned -16
Jul 22 21:42:16 aries kernel: [    3.232749] md: starting md2 failed
Jul 22 21:42:16 aries kernel: [    5.662820] md: bind<sdk1>
Jul 22 21:42:16 aries kernel: [    5.664963] md: bind<sdl1>
Jul 22 21:42:16 aries kernel: [    5.667157] md: bind<sdp1>
Jul 22 21:42:16 aries kernel: [    5.669429] md: bind<sdo1>
Jul 22 21:42:16 aries kernel: [    5.671745] md: bind<sdm1>
Jul 22 21:46:51 aries kernel: [  286.362334] md: md10 stopped.
Jul 22 21:46:51 aries kernel: [  286.362341] md: unbind<sdl1>
Jul 22 21:46:51 aries kernel: [  286.369780] md: export_rdev(sdl1)
Jul 22 21:46:51 aries kernel: [  286.369883] md: unbind<sdk1>
Jul 22 21:46:51 aries kernel: [  286.374772] md: export_rdev(sdk1)
Jul 22 21:46:53 aries kernel: [  287.786390] md: md20 stopped.
Jul 22 21:46:53 aries kernel: [  287.786396] md: unbind<sdm1>
Jul 22 21:46:53 aries kernel: [  287.794128] md: export_rdev(sdm1)
Jul 22 21:46:53 aries kernel: [  287.794232] md: unbind<sdo1>
Jul 22 21:46:53 aries kernel: [  287.799128] md: export_rdev(sdo1)
Jul 22 21:46:53 aries kernel: [  287.799231] md: unbind<sdp1>
Jul 22 21:46:53 aries kernel: [  287.804129] md: export_rdev(sdp1)
Jul 22 21:46:58 aries kernel: [  293.034362] md: md10 stopped.
Jul 22 21:46:58 aries kernel: [  293.035431] md: bind<sdf1>
Jul 22 21:46:58 aries kernel: [  293.035534] md: bind<sdg1>
Jul 22 21:46:58 aries kernel: [  293.035637] md: bind<sdh1>
Jul 22 21:46:58 aries kernel: [  293.035740] md: bind<sdi1>
Jul 22 21:46:58 aries kernel: [  293.035842] md: bind<sdj1>
Jul 22 21:46:58 aries kernel: [  293.035939] md: bind<sdk1>
Jul 22 21:46:58 aries kernel: [  293.036028] md: bind<sdl1>
Jul 22 21:46:58 aries kernel: [  293.036125] md: bind<sde1>
Jul 22 21:46:58 aries kernel: [  293.080900] md: md20 stopped.
Jul 22 21:46:58 aries kernel: [  293.081846] md: bind<sdm1>
Jul 22 21:46:58 aries kernel: [  293.082002] md: bind<sdo1>
Jul 22 21:46:58 aries kernel: [  293.082123] md: bind<sdp1>
Jul 22 21:46:58 aries kernel: [  293.082264] md: bind<sdn1>


I'm sure I'm missing somethnig simple. I would just like this server to be able to reboot without intervention. I could easily create a script to restart the arrays on boot, but it doesn't seem proper.

Let me know your ideas,

Thanks!
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PostPosted: Thu Jul 24, 2014 9:27 pm    Post subject: Reply with quote

Are you starting the mdadm script at boot? Make sure that service is in the default startup list. Or maybe is it possible those disks show up later in the boot sequence after mdadm has started? Like in the case of USB or something like that?
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the.root
Apprentice
Apprentice


Joined: 29 Apr 2007
Posts: 210
Location: -84.706059324915, -62.4843750666430

PostPosted: Thu Jul 24, 2014 9:54 pm    Post subject: Reply with quote

yeah i've tried putting the init script in the boot and default runlevel, neither seemed to make a difference. and no these are all internal sata drives, they should be detected individually at boot.

messages, before any md messages it detects all the sdX sata drives
Code:

Jul 22 21:42:16 aries kernel: [    1.189329] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
Jul 22 21:42:16 aries kernel: [    1.189532] sd 0:0:0:0: Attached scsi generic sg0 type 0
Jul 22 21:42:16 aries kernel: [    1.190062] sd 1:0:0:0: [sdb] 312581808 512-byte logical blocks: (160 GB/149 GiB)
Jul 22 21:42:16 aries kernel: [    1.190187] sd 1:0:0:0: Attached scsi generic sg1 type 0
Jul 22 21:42:16 aries kernel: [    1.190214] sd 1:0:0:0: [sdb] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.190216] sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.190254] sd 1:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.193955] sd 0:0:0:0: [sda] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.194312] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.194324] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.203394] sd 2:0:0:0: [sdc] 2930277168 512-byte logical blocks: (1.50 TB/1.36 TiB)
Jul 22 21:42:16 aries kernel: [    1.203767] sd 2:0:0:0: Attached scsi generic sg2 type 0
Jul 22 21:42:16 aries kernel: [    1.204281] sd 3:0:0:0: [sdd] 2930277168 512-byte logical blocks: (1.50 TB/1.36 TiB)
Jul 22 21:42:16 aries kernel: [    1.204398] sd 3:0:0:0: [sdd] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.204400] sd 3:0:0:0: [sdd] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.204413] sd 3:0:0:0: Attached scsi generic sg3 type 0
Jul 22 21:42:16 aries kernel: [    1.204462] sd 3:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.204885] sd 4:0:0:0: [sde] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jul 22 21:42:16 aries kernel: [    1.204886] sd 4:0:0:0: [sde] 4096-byte physical blocks
Jul 22 21:42:16 aries kernel: [    1.204971] sd 4:0:0:0: Attached scsi generic sg4 type 0
Jul 22 21:42:16 aries kernel: [    1.204979] sd 4:0:0:0: [sde] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.204981] sd 4:0:0:0: [sde] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.205018] sd 4:0:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.205404] sd 5:0:0:0: [sdf] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jul 22 21:42:16 aries kernel: [    1.205405] sd 5:0:0:0: [sdf] 4096-byte physical blocks
Jul 22 21:42:16 aries kernel: [    1.205481] sd 5:0:0:0: Attached scsi generic sg5 type 0
Jul 22 21:42:16 aries kernel: [    1.205488] sd 5:0:0:0: [sdf] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.205490] sd 5:0:0:0: [sdf] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.205530] sd 5:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.208098] sd 8:0:0:0: [sdg] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jul 22 21:42:16 aries kernel: [    1.208099] sd 8:0:0:0: [sdg] 4096-byte physical blocks
Jul 22 21:42:16 aries kernel: [    1.208206] sd 8:0:0:0: Attached scsi generic sg6 type 0
Jul 22 21:42:16 aries kernel: [    1.208210] sd 8:0:0:0: [sdg] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.208211] sd 8:0:0:0: [sdg] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.208248] sd 8:0:0:0: [sdg] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.208627] sd 9:0:0:0: [sdh] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jul 22 21:42:16 aries kernel: [    1.208628] sd 9:0:0:0: [sdh] 4096-byte physical blocks
Jul 22 21:42:16 aries kernel: [    1.208719] sd 9:0:0:0: [sdh] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.208721] sd 9:0:0:0: Attached scsi generic sg7 type 0
Jul 22 21:42:16 aries kernel: [    1.208722] sd 9:0:0:0: [sdh] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.208758] sd 9:0:0:0: [sdh] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.209130] sd 10:0:0:0: [sdi] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jul 22 21:42:16 aries kernel: [    1.209131] sd 10:0:0:0: [sdi] 4096-byte physical blocks
Jul 22 21:42:16 aries kernel: [    1.209222] sd 10:0:0:0: [sdi] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.209223] sd 10:0:0:0: [sdi] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.209242] sd 10:0:0:0: Attached scsi generic sg8 type 0
Jul 22 21:42:16 aries kernel: [    1.209282] sd 10:0:0:0: [sdi] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.214057]  sdd: sdd1 sdd2 sdd3
Jul 22 21:42:16 aries kernel: [    1.214802] sd 3:0:0:0: [sdd] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.226188]  sda: sda1 sda2 sda3 sda4 sda5
Jul 22 21:42:16 aries kernel: [    1.227180] sd 0:0:0:0: [sda] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.229350] sd 2:0:0:0: [sdc] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.229351] sd 2:0:0:0: [sdc] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.229362] sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.234685] sd 11:0:0:0: [sdj] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jul 22 21:42:16 aries kernel: [    1.234759] sd 11:0:0:0: Attached scsi generic sg9 type 0
Jul 22 21:42:16 aries kernel: [    1.235802] sd 16:0:0:0: [sdk] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jul 22 21:42:16 aries kernel: [    1.235803] sd 16:0:0:0: [sdk] 4096-byte physical blocks
Jul 22 21:42:16 aries kernel: [    1.235887] sd 16:0:0:0: Attached scsi generic sg11 type 0
Jul 22 21:42:16 aries kernel: [    1.235943] sd 16:0:0:0: [sdk] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.235944] sd 16:0:0:0: [sdk] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.235980] sd 16:0:0:0: [sdk] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.236286] sd 17:0:0:0: [sdl] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
Jul 22 21:42:16 aries kernel: [    1.236288] sd 17:0:0:0: [sdl] 4096-byte physical blocks
Jul 22 21:42:16 aries kernel: [    1.236381] sd 17:0:0:0: Attached scsi generic sg12 type 0
Jul 22 21:42:16 aries kernel: [    1.236382] sd 17:0:0:0: [sdl] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.236384] sd 17:0:0:0: [sdl] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.236422] sd 17:0:0:0: [sdl] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.238911]  sdb: sdb1 sdb2 sdb3 sdb4 sdb5
Jul 22 21:42:16 aries kernel: [    1.239872] sd 1:0:0:0: [sdb] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.242292]  sdc: sdc1 sdc2 sdc3
Jul 22 21:42:16 aries kernel: [    1.243108] sd 2:0:0:0: [sdc] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.244790] sd 11:0:0:0: [sdj] 4096-byte physical blocks
Jul 22 21:42:16 aries kernel: [    1.245180] sd 11:0:0:0: [sdj] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.245535] sd 11:0:0:0: [sdj] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.245548] sd 11:0:0:0: [sdj] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.245861]  sdg: sdg1
Jul 22 21:42:16 aries kernel: [    1.246370] sd 8:0:0:0: [sdg] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.247670]  sdh: sdh1
Jul 22 21:42:16 aries kernel: [    1.248567] sd 9:0:0:0: [sdh] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.249985]  sde: sde1
Jul 22 21:42:16 aries kernel: [    1.250942] sd 4:0:0:0: [sde] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.257034]  sdf: sdf1
Jul 22 21:42:16 aries kernel: [    1.257962] sd 5:0:0:0: [sdf] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.270721]  sdi: sdi1
Jul 22 21:42:16 aries kernel: [    1.271906] sd 10:0:0:0: [sdi] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.287770]  sdk: sdk1
Jul 22 21:42:16 aries kernel: [    1.288713] sd 16:0:0:0: [sdk] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.302860]  sdl: sdl1
Jul 22 21:42:16 aries kernel: [    1.303783] sd 17:0:0:0: [sdl] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.306141]  sdj: sdj1
Jul 22 21:42:16 aries kernel: [    1.314928] sd 11:0:0:0: [sdj] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.816908] sd 18:0:0:0: [sdm] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul 22 21:42:16 aries kernel: [    1.817074] sd 18:0:0:0: Attached scsi generic sg13 type 0
Jul 22 21:42:16 aries kernel: [    1.817631] sd 19:0:0:0: [sdn] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul 22 21:42:16 aries kernel: [    1.817736] sd 19:0:0:0: Attached scsi generic sg14 type 0
Jul 22 21:42:16 aries kernel: [    1.817770] sd 19:0:0:0: [sdn] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.817771] sd 19:0:0:0: [sdn] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.817812] sd 19:0:0:0: [sdn] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.820805] sd 18:0:0:0: [sdm] Write Protect is off
Jul 22 21:42:16 aries kernel: [    1.821150] sd 18:0:0:0: [sdm] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    1.821169] sd 18:0:0:0: [sdm] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    1.873037]  sdm: sdm1
Jul 22 21:42:16 aries kernel: [    1.873989] sd 18:0:0:0: [sdm] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    1.882036]  sdn: sdn1
Jul 22 21:42:16 aries kernel: [    1.882968] sd 19:0:0:0: [sdn] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    2.205951] sd 20:0:0:0: [sdo] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul 22 21:42:16 aries kernel: [    2.206093] sd 20:0:0:0: Attached scsi generic sg15 type 0
Jul 22 21:42:16 aries kernel: [    2.207063] sd 20:0:0:0: [sdo] Write Protect is off
Jul 22 21:42:16 aries kernel: [    2.207440] sd 20:0:0:0: [sdo] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    2.207452] sd 20:0:0:0: [sdo] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    2.269960]  sdo: sdo1
Jul 22 21:42:16 aries kernel: [    2.270901] sd 20:0:0:0: [sdo] Attached SCSI disk
Jul 22 21:42:16 aries kernel: [    2.869240] sd 21:0:0:0: [sdp] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul 22 21:42:16 aries kernel: [    2.869336] sd 21:0:0:0: Attached scsi generic sg16 type 0
Jul 22 21:42:16 aries kernel: [    2.870331] sd 21:0:0:0: [sdp] Write Protect is off
Jul 22 21:42:16 aries kernel: [    2.871724] sd 21:0:0:0: [sdp] Mode Sense: 00 3a 00 00
Jul 22 21:42:16 aries kernel: [    2.871736] sd 21:0:0:0: [sdp] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 22 21:42:16 aries kernel: [    2.924498]  sdp: sdp1
Jul 22 21:42:16 aries kernel: [    2.925121] sd 21:0:0:0: [sdp] Attached SCSI disk

_________________
Ps = (1.5 x 6 x .75) / {(4/3) (pi) [(31.039 x 10^15) (46.5 x 10^9)]^3}
Seems like a waste..
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