Re: Problem with legacy megaraid

[Andrew Morton <akpm@osdl.org>]

On Sat, 30 Sep 2006 10:06:36 -0500
"Chris Lee" <labmonkey42@gmail.com> wrote:

> I am not subscribed to this list.  Please CC me on replies.

(more cc's added)

> I have a machine I'm trying to use as a file server.  I have a RAID10 and a
> RAID5 on a single Dell PERC2/DC (AMI Megaraid 467) controller.  Both arrays
> are also on the same SCSI channel.  The system runs fine for days on end
> until I put some heavy I/O load on either array and sustain it for a few
> seconds.

We recently discovered that "The old megaraid driver is apparently borken
for firmware newer than 6.61.".  So please check that and see if a
downgrade is needed.

Is there some reason why you cannot use the new megaraid driver?


> Distro: Gentoo Linux
> Kernel: 2.6.17-gentoo-r7
> 
> Hardware:
> Motherboard: Tyan Thunder i7501 Pro (S2721-533)
> CPUs: Dual 2.8Ghz P4 HT Xeons
> RAM: 4GB registered (3/1 split, flat model)
> RAID: Dell PERC2/DC (AMI Megaraid 467)
> SCSI: Adaptec AHA-2940U2/U2W PCI
> NICs: onboard e100 and dual onboard e1000
> 
> There are 14 hard drives on channel 0 of the perc2/dc.  IDs 1-6 are RAID10
> mounted in an external enclosure; IDs 8-15 are RAID5 mounted internally.
> The I/O problems occur on either array, which suggests to me that it is not
> a cabling issue.
> 
> To reproduce the problem for the purpose of this email I ran `bonnie++ -d
> /home/nobody -u nobody:nogroup` where /home is the mountpoint of the RAID5
> and bonnie++ created an 8GB file.  I have reproduced this problem numerous
> times and the sustained I/O time required to create the fault varies.  Once
> it happened running a ./configure script for some rather small package.
> However, this time it took approximately 20-30 minutes before it freaked
> out.
> 
> Once the problem occurs I have to reboot the machine to regain use of the
> affected array(s).  I should note that the controller bios finds nothing
> wrong with the arrays, and when e2fsck is forced on boot it replays the
> journal and reports no other problems aside from a "Superblock last write
> time is in the future.  FIXED." which I attribute to a misconfiguration on
> my part for saving system time to hardware clock.  If I attempt to unmount
> the array and mount it again without rebooting I get an error message that
> sdXX is not a valid block device.
> 
> Logs/info:
> 
> active vt says (this is copied via eyeball):
> [4513644.094000] ext3_aboart called.
> [4513644.101000] EXT3-fs error (device sdb1): ext3_journal_start_sb: <3>sd
> 0:0:1:0: rejecting I/O to offline device
> [4513644.109000] Remounting filesystem read-only
> 
> dmesg stuff about megaraid:
> [4294675.180000] megaraid: found 0x8086:0x1960:bus 3:slot 3:func 1
> [4294675.191000] scsi0:Found MegaRAID controller at 0xf8806000, IRQ:177
> [4294675.254000] megaraid: [1.06:1p00] detected 2 logical drives.
> [4294675.316000] megaraid: channel[0] is raid.
> [4294675.326000] megaraid: channel[1] is raid.
> [4294675.362000] scsi0 : LSI Logic MegaRAID 1.06 254 commands 16 targs 5
> chans 7 luns
> [4294675.372000] scsi0: scanning scsi channel 0 for logical drives.
> [4294675.383000]   Vendor: MegaRAID  Model: LD0 RAID1 09634R  Rev: 1.06
> [4294675.393000]   Type:   Direct-Access                      ANSI SCSI
> revision: 02
> [4294675.404000]   Vendor: MegaRAID  Model: LD1 RAID5 38288R  Rev: 1.06
> [4294675.415000]   Type:   Direct-Access                      ANSI SCSI
> revision: 02
> [4294675.428000] scsi0: scanning scsi channel 4 [P0] for physical devices.
> [4294675.726000] scsi0: scanning scsi channel 5 [P1] for physical devices.
> [4294680.126000] megaraid cmm: 2.20.2.6 (Release Date: Mon Mar 7 00:01:03
> EST 2005)
> [4294680.136000] megaraid: 2.20.4.8 (Release Date: Mon Apr 11 12:27:22 EST
> 2006)
> [4294680.157000] SCSI device sda: 429330432 512-byte hdwr sectors (219817
> MB)
> [4294680.167000] sda: Write Protect is off
> [4294680.198000] SCSI device sda: 429330432 512-byte hdwr sectors (219817
> MB)
> [4294680.208000] sda: Write Protect is off
> [4294680.237000]  sda: sda1 sda2
> [4294680.247000] sd 0:0:0:0: Attached scsi disk sda
> [4294680.257000] SCSI device sdb: 2126413824 512-byte hdwr sectors (1088724
> MB)
> [4294680.267000] sdb: Write Protect is off
> [4294680.296000] SCSI device sdb: 2126413824 512-byte hdwr sectors (1088724
> MB)
> [4294680.305000] sdb: Write Protect is off
> [4294680.334000]  sdb: sdb1
> [4294680.345000] sd 0:0:1:0: Attached scsi disk sdb
> [4294680.355000] sd 0:0:0:0: Attached scsi generic sg0 type 0
> [4294680.365000] sd 0:0:1:0: Attached scsi generic sg1 type 0
> 
> /var/log/messages:
> Sep 29 07:46:16 hostname kernel: [4513615.601000] sd 0:0:1:0: SCSI error:
> return code = 0x40001
> Sep 29 07:46:16 hostname kernel: [4513615.601000] end_request: I/O error,
> dev sdb, sector 1744348567
> Sep 29 07:46:16 hostname kernel: [4513615.601000] Buffer I/O error on device
> sdb1, logical block 218043563
> Sep 29 07:46:16 hostname kernel: [4513615.601000] lost page write due to I/O
> error on sdb1
> Sep 29 07:46:16 hostname kernel: [4513615.601000] sd 0:0:1:0: SCSI error:
> return code = 0x40001
> Sep 29 07:46:16 hostname kernel: [4513615.601000] end_request: I/O error,
> dev sdb, sector 1744348695
> Sep 29 07:46:16 hostname kernel: [4513615.601000] Buffer I/O error on device
> sdb1, logical block 218043579
> Sep 29 07:46:16 hostname kernel: [4513615.601000] lost page write due to I/O
> error on sdb1
> Sep 29 07:46:16 hostname kernel: [4513615.778000] sd 0:0:1:0: SCSI error:
> return code = 0x40001
> Sep 29 07:46:16 hostname kernel: [4513615.778000] end_request: I/O error,
> dev sdb, sector 1744348823
> Sep 29 07:46:16 hostname kernel: [4513615.778000] Buffer I/O error on device
> sdb1, logical block 218043595
> Sep 29 07:46:16 hostname kernel: [4513615.778000] lost page write due to I/O
> error on sdb1
> Sep 29 07:46:16 hostname kernel: [4513615.778000] sd 0:0:1:0: SCSI error:
> return code = 0x40001
> Sep 29 07:46:44 hostname kernel: [4513615.778000] end_request: I/O error,
> dev sdb, sector 1744348951
> Sep 29 07:46:44 hostname kernel: [4513615.778000] Buffer I/O error on device
> sdb1, logical block 218043611
> Sep 29 07:46:44 hostname kernel: [4513615.778000] lost page write due to I/O
> error on sdb1
> Sep 29 07:46:44 hostname kernel: [4513615.778000] sd 0:0:1:0: SCSI error:
> return code = 0x40001
> Sep 29 07:46:44 hostname kernel: [4513615.778000] end_request: I/O error,
> dev sdb, sector 1744348959
> Sep 29 07:46:44 hostname kernel: [4513615.778000] Buffer I/O error on device
> sdb1, logical block 218043612
> Sep 29 07:46:44 hostname kernel: [4513615.778000] lost page write due to I/O
> error on sdb1
> Sep 29 07:46:44 hostname kernel: [4513643.303000] sd 0:0:1:0: rejecting I/O
> to offline device
> Sep 29 07:46:44 hostname last message repeated 92 times
> 
> The last two lines repeat as long as something continues trying to access
> that logical drive.
> 
> If any other logs/info would be useful please let me know and I will by
> happy to include them.  TIA for any help.  Also I apologise if this is not
> relevant for the list.
> 
> Thanks,
> Chris 
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