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snIP3r
l33t
Joined: 21 May 2004
Posts: 853
Location: germany
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 Posted: Wed Oct 24, 2007 7:02 pm Post subject: 3ware 9650 controller read cache disabled - how to enable? |
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hi all!
recently i checked my dmseg messages to check everything is ok, i found out that on my 3ware controller the read cache is disabled:
| Code: |
3ware 9000 Storage Controller device driver for Linux v2.26.02.009.
ACPI: PCI Interrupt Link [APC7] enabled at IRQ 16
ACPI: PCI Interrupt 0000:02:00.0[A] -> Link [APC7] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:02:00.0 to 64
scsi0 : 3ware 9000 Storage Controller
3w-9xxx: scsi0: Found a 3ware 9000 Storage Controller at 0xfdeff000, IRQ: 16.
3w-9xxx: scsi0: Firmware FE9X 3.06.00.003, BIOS BE9X 3.06.00.002, Ports: 4.
scsi 0:0:0:0: Direct-Access AMCC 9650SE-4LP DISK 3.06 PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 1874933760 512-byte hardware sectors (959966 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 23 00 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: disabled, doesn't support DPO or FUA
sd 0:0:0:0: [sda] 1874933760 512-byte hardware sectors (959966 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 23 00 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: disabled, doesn't support DPO or FUA
sda: sda1 sda2 sda3 sda4
sd 0:0:0:0: [sda] Attached SCSI disk
sd 0:0:0:0: Attached scsi generic sg0 type 0
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i am wondering about this because the write cache is enabled. perhaps this might be an issue for the "poor" read performance of the controller like beeing discussed here https://forums.gentoo.org/viewtopic-t-556357-highlight-3ware.html
i use kernel 2.6.22-gentoo-r8 using driver version 2.26.02.009, in 3dm2 software i have enabled storsave "performance" profile. i do have no bbu connected to the 3ware controller because i have an apc "Back-UPS BR 800" ups connected to my server 
is there a way to enable the read cache??
any help would be appreciated!
thx in advance
snIP3r
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Intel i3-4130T on ASUS P9D-X
Kernel 5.15.88-gentoo SMP
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mwhitlock
Tux's lil' helper
Joined: 07 Aug 2006
Posts: 87
Location: New Hampshire, USA
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| Posted: Tue Oct 30, 2007 6:53 pm Post subject: Mine says that, too |
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Mine says that, too: | Code: | 3ware 9000 Storage Controller device driver for Linux v2.26.02.009.
ACPI: PCI Interrupt 0000:02:00.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:02:00.0 to 64
scsi0 : 3ware 9000 Storage Controller
3w-9xxx: scsi0: Found a 3ware 9000 Storage Controller at 0xe5200000, IRQ: 16.
3w-9xxx: scsi0: Firmware FE9X 3.08.02.007, BIOS BE9X 3.08.00.002, Ports: 8.
scsi 0:0:0:0: Direct-Access AMCC 9650SE-8LP DISK 3.08 PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 3749867520 512-byte hardware sectors (1919932 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 23 00 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: disabled, doesn't support DPO or FUA
sd 0:0:0:0: [sda] 3749867520 512-byte hardware sectors (1919932 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 23 00 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: disabled, doesn't support DPO or FUA
sda: sda1
sd 0:0:0:0: [sda] Attached SCSI disk
sd 0:0:0:0: Attached scsi generic sg0 type 0 |
But what do you consider poor read performance? Here's what I get: | Code: | # hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 9538 MB in 2.00 seconds = 4775.46 MB/sec
Timing buffered disk reads: 1212 MB in 3.00 seconds = 403.73 MB/sec |
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snIP3r
l33t
Joined: 21 May 2004
Posts: 853
Location: germany
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| Posted: Tue Oct 30, 2007 7:05 pm Post subject: |
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yes! mine is poor compared to yours:
| Code: |
area52 ~ # hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 2262 MB in 2.00 seconds = 1131.32 MB/sec
Timing buffered disk reads: 544 MB in 3.01 seconds = 180.62 MB/sec
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but i saw that you have a newer firmware... perhaps this might be the issue? i also saw you have an 8port controller, mine is only 4port.
what drives do you use?? i use 4x320gb wd 3200ys raid edition
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Intel i3-4130T on ASUS P9D-X
Kernel 5.15.88-gentoo SMP
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WhiteSpade
Tux's lil' helper
Joined: 16 Apr 2005
Posts: 89
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| Posted: Thu Nov 08, 2007 8:09 am Post subject: |
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So, the thing to use is sdparm to do this. It's in portage. In theory you just run the following command and then all is well
| Code: | | sdparm -s RCD=0 -S /dev/sda |
This, of course, doesn't work for me and I get an error.
| Code: | /dev/sda: AMCC 9500S-8 DISK 2.08
change_mode_page: failed setting page: Caching (SBC) |
I've tried setting this using hdparm and blktool, but no dice so far. Anyone have any thoughts? Is the problem because it's seeing the card and not the drives?
I hope the sdparm command helps you.
---Alex |
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snIP3r
l33t
Joined: 21 May 2004
Posts: 853
Location: germany
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| Posted: Thu Nov 08, 2007 3:12 pm Post subject: |
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| WhiteSpade wrote: | So, the thing to use is sdparm to do this. It's in portage. In theory you just run the following command and then all is well
| Code: | | sdparm -s RCD=0 -S /dev/sda |
This, of course, doesn't work for me and I get an error.
| Code: | /dev/sda: AMCC 9500S-8 DISK 2.08
change_mode_page: failed setting page: Caching (SBC) |
I've tried setting this using hdparm and blktool, but no dice so far. Anyone have any thoughts? Is the problem because it's seeing the card and not the drives?
I hope the sdparm command helps you.
---Alex |
hi alex!
thx for your reply! i thisk this will also not work for me cause i have also an 3ware controller... but i think i will try.
does the usage of sdparm make your system hang up??
greets
snIP3r
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Intel i3-4130T on ASUS P9D-X
Kernel 5.15.88-gentoo SMP
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WhiteSpade
Tux's lil' helper
Joined: 16 Apr 2005
Posts: 89
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| Posted: Thu Nov 08, 2007 4:31 pm Post subject: |
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sdparm doesn't make my system hang up, but I noticed that using old firmwares caused me random hang-ups when using tw_cli. 3ware is pretty specific about which firmware should be used with which bios and which client. Make sure they're all up to date and that might fix it. It fixed the hanging for me.
Let me know if you make any progress!
---Alex |
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BernieKe
Tux's lil' helper
Joined: 02 Jul 2002
Posts: 130
Location: California/Bangalore/Belgium
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