[dm-devel] Dell MD3000/multipath - huge numbers of I/O errors on boot

[Moger, Babu]

Good.. Good.. Thanks for the update...

--Babu Moger 

> -----Original Message-----
> From: dm-devel-bounces at redhat.com [mailto:dm-devel-bounces at redhat.com]
> On Behalf Of John Hughes
> Sent: Tuesday, September 29, 2009 11:56 AM
> To: device-mapper development
> Subject: Re: [dm-devel] Dell MD3000/multipath - huge numbers of I/O
> errors on boot
> 
> Moger, Babu wrote:
> > This is a know problem.. As far as I know these errors mostly come
> during the boot-up if the scsi rdac handler is not there in the initrd
> image. You might want to try building scsi_dh_rdac into the initrd
> image.
> Yay!  that works.  Now I get a nice quiet(ish) boot:
> 
> [    0.000000] Initializing cgroup subsys cpuset
> ...
> [    1.292136] SCSI subsystem initialized
> [    1.294173] rdac: device handler registered
> ...
> [   30.781404] scsi3 : ioc0: LSISAS1068 B0, FwRev=000a3300h, Ports=1,
> MaxQ=366, IRQ=38
> [   30.820324] scsi 3:0:0:0: Direct-Access     DELL     MD3000
> 0735 PQ: 0 ANSI: 5
> [   30.843415] scsi 3:0:0:0: rdac: LUN 0 (owned)
> [   30.843838] sd 3:0:0:0: [sdb] 142323712 512-byte hardware sectors:
> (72.8 GB/67.8 GiB)
> [   30.844158] sd 3:0:0:0: [sdb] Write Protect is off
> [   30.844251] sd 3:0:0:0: [sdb] Mode Sense: 77 00 10 08
> [   30.844929] sd 3:0:0:0: [sdb] Write cache: enabled, read cache:
> enabled, supports DPO and FUA
> [   30.845678] sd 3:0:0:0: [sdb] 142323712 512-byte hardware sectors:
> (72.8 GB/67.8 GiB)
> [   30.846020] sd 3:0:0:0: [sdb] Write Protect is off
> [   30.846114] sd 3:0:0:0: [sdb] Mode Sense: 77 00 10 08
> [   30.846532] sd 3:0:0:0: [sdb] Write cache: enabled, read cache:
> enabled, supports DPO and FUA
> [   30.846649]  sdb: unknown partition table
> [   30.857018] sd 3:0:0:0: [sdb] Attached SCSI disk
> [   30.857114] sd 3:0:0:0: Embedded Enclosure Device
> [   31.229896] sd 3:0:0:0: Attached scsi generic sg3 type 0
> [   31.234390] scsi 3:0:0:1: Direct-Access     DELL     MD3000
> 0735 PQ: 0 ANSI: 5
> [   31.256709] scsi 3:0:0:1: rdac: LUN 1 (unowned)
> [   31.257125] sd 3:0:0:1: [sdc] 142323712 512-byte hardware sectors:
> (72.8 GB/67.8 GiB)
> [   31.257444] sd 3:0:0:1: [sdc] Write Protect is off
> [   31.257539] sd 3:0:0:1: [sdc] Mode Sense: 77 00 10 08
> [   31.257909] sd 3:0:0:1: [sdc] Write cache: enabled, read cache:
> enabled, supports DPO and FUA
> [   31.258338] sd 3:0:0:1: [sdc] 142323712 512-byte hardware sectors:
> (72.8 GB/67.8 GiB)
> [   31.258651] sd 3:0:0:1: [sdc] Write Protect is off
> [   31.258744] sd 3:0:0:1: [sdc] Mode Sense: 77 00 10 08
> [   31.259108] sd 3:0:0:1: [sdc] Write cache: enabled, read cache:
> enabled, supports DPO and FUA
> [   31.259223]  sdc:<2>ldm_validate_partition_table(): Disk read
> failed.
> [   31.264296] Dev sdc: unable to read RDB block 0
> [   31.264389]  unable to read partition table
> [   31.264521] sd 3:0:0:1: [sdc] Attached SCSI disk
> [   31.264614] sd 3:0:0:1: Embedded Enclosure Device
> [   31.528977] sd 3:0:0:1: Attached scsi generic sg4 type 0
> 
> 
> 
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