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unz
l33t
Joined: 28 Jul 2004
Posts: 819
Location: Roma, Italia
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 Posted: Wed Jul 28, 2004 12:40 am Post subject: help! |
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i'd like to thank mr vlad_tepes that helped me with my 80+80gb on pdc20276 controller. But i got some questions more  :
@ booting i got some strange errors and i am adviced to /sbin/depscan.sh .. i do but nothing .. errors just continue, but it's only extetic [ i hope]
-your script creates a partition for every partion found, but i need only 2, how can i custumize it? [ i need only raid0p5, raid0p6]
-another problem is that only root can really use those partitions, normal user can only read [just the same icon for all the files] ... my fstab is ignored.
thanks a lot guy, without your how-to i'd not installed 2.6.7 
unz |
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danone
Guru
Joined: 18 Jan 2004
Posts: 398
Location: Germany
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| Posted: Wed Jul 28, 2004 6:12 am Post subject: |
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As i posted before does someone got a RAID1 Mirrorset working?How to use dmsetup to crate a mirrortaget I lokked ito man pages and so but no luck
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unz
l33t
Joined: 28 Jul 2004
Posts: 819
Location: Roma, Italia
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| Posted: Wed Jul 28, 2004 12:39 pm Post subject: RAID0 with pdc20276 and two partitions ... success!!! |
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ok, i've done ... 
it's not elegant ... but works!
my way differs a bit from vlad, 'cos his script didn't work for me ... i changed stripe-mapper.sh in a ugly
| Code: |
#!/bin/sh
echo 0 $(expr $(blockdev --getsize /dev/hde) '*' 2) striped 2 128 /dev/hde 0 /dev/hdg 0 > /etc/stripemaps/raid.devmap
dmsetup create raid0 /etc/stripemaps/raid.devmap
dmsetup create raid0p1 /etc/stripemaps/raid0p1.devmap
dmsetup create raid0p5 /etc/stripemaps/raid0p5.devmap
dmsetup create raid0p6 /etc/stripemaps/raid0p6.devmap
mount -t vfat -o,uid=1000 /dev/mapper/raid0p5 /windows/E
mount -t vfat -o,uid=1000 /dev/mapper/raid0p6 /windows/F
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solving all the problems about chmodes and the right size of my partitions
cheers
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mauricec
n00b
Joined: 20 Mar 2004
Posts: 20
Location: Nieuwerbrug, Holland
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| Posted: Sun Sep 26, 2004 12:44 pm Post subject: |
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Great howto.....
I've installed Gentoo with 2.4.27-gentoo-r1 and enabled the device-mapper, so I can test it with ataraid and dev-mapper ( and be able to boot from disk ).
All seems great, expected results given in this topic, but I'm unable to mount any of my paritions....
And I really want to change to 2.6
What i did :
Read the topic very well
Using Vlad_tepes scripts, wich works fine
| Code: | | echo 0 $(expr $(blockdev --getsize /dev/hde) '*' 2) striped 2 128 /dev/hde 0 /dev/hdg 0 > /etc/stripemaps/raid0.devmap |
Create disk in devmapper :
| Code: | | dmsetup create raid0 /etc/stripemaps/raid0.devmap |
sfdisk gives me this:
| Code: | /dev/mapper/raid0p1 : start= 63, size= 499905, Id=83
/dev/mapper/raid0p2 : start= 499968, size= 4007808, Id=83
/dev/mapper/raid0p3 : start= 4507776, size= 9773568, Id=83
/dev/mapper/raid0p4 : start= 14281344, size=305883648, Id= 5
/dev/mapper/raid0p5 : start= 14281407, size= 2007873, Id=82
/dev/mapper/raid0p6 : start= 16289343, size= 39070017, Id=83
/dev/mapper/raid0p7 : start= 55359423, size=264805569, Id=83
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So i made the file /etc/stripemapper/raid0p1.devmap containing this :
| Code: | | 0 499905 linear /dev/mapper/raid0 63 |
Using /etc/init.d/ataraid to create the mapper devices.
Now i should be able to :
| Code: | | mount -t ext3 /dev/mapper/raid0p1 /mnt/floppy |
But it returns :
| Code: | mount: wrong fs type, bad option, bad superblock on /dev/mapper/raid0p1,
or too many mounted file systems
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And that really pisses me off .....
Anyone any idea ???
Because now I'm stuck with the ataraid driver ( wich works fine ), and I'm not able to move on .... ie not able to use 2.6 kernel... |
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smog_at
Apprentice
Joined: 08 Jul 2003
Posts: 215
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| Posted: Wed Nov 08, 2006 4:16 pm Post subject: |
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Has anyone tested it with a mirror?
It's a good how-to but i need a mirror instead of an stripe. Need I only change the argument?
From:
| Code: |
echo 0 $(expr $(blockdev --getsize /dev/hde) '*' 2) striped 2 128 /dev/hde 0 /dev/hdg 0 > devmap.raid
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to
| Code: |
echo 0 $(expr $(blockdev --getsize /dev/hde) '*' 2) mirrored 2 128 /dev/hde 0 /dev/hdg 0 > devmap.raid
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?
lg smog_at |
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Rad
Guru
Joined: 11 Feb 2004
Posts: 401
Location: Bern, Switzerland
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| Posted: Wed Nov 08, 2006 6:18 pm Post subject: |
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You don't have the option to use mdadm instead of dmraid?
Because if you can, you should. |
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smog_at
Apprentice
Joined: 08 Jul 2003
Posts: 215
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| Posted: Wed Nov 08, 2006 6:51 pm Post subject: |
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Hmmm... i've the option, but I didn't found any tutorials or how-tows about mdadm
Lg smog_at |
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Rad
Guru
Joined: 11 Feb 2004
Posts: 401
Location: Bern, Switzerland
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| Posted: Wed Nov 08, 2006 8:18 pm Post subject: |
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Creating an array with mdadm is very simple. Something like "mdadm --create --verbose /dev/md1 --level=1 --raid-devices=2 /dev/sda1 /dev/sdb1" does the job, provided you have the kernel modules and mdadm installed.
Gentoo-wiki also contains information, which should be helpful even if you don't try to install gentoo on a raid array. |
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