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Re: [dm-devel] Dell MD3200 - sd: Current: sense key: Illegal Request ASC=0x94 ASCQ=0x1ASC=0x94 ASCQ=0x1



The lvols are EXT4, and I see that barrier is enabled by-default. I can try disabling, but need to investigate a bit.

Also, I believe I may have isolated the problem a bit. I can only cause this behavior when I access these volumes from an NFS client.

I think this might be put it out of scope of the dm code.


-Charles



On 3/3/11 23:34 , Moger, Babu wrote:
I have looked at your logs.. Here are the messages..

Mar  3 15:38:37 rman-ss-03 kernel: sd 1:0:0:0: Done: SUCCESS
Mar  3 15:38:37 rman-ss-03 kernel:         2 sd 1:0:0:0:
Mar  3 15:38:37 rman-ss-03 kernel:         command: Synchronize Cache(10): 35 00 00 00 00 00 00 00 00 00
Mar  3 15:38:37 rman-ss-03 kernel: : Current: sense key: Illegal Request
Mar  3 15:38:37 rman-ss-03 kernel:<<vendor>>  ASC=0x94 ASCQ=0x1ASC=0x94 ASCQ=0x1
Mar  3 15:38:37 rman-ss-03 kernel:
Mar  3 15:38:38 rman-ss-03 kernel: sd 1:0:0:0: Done: SUCCESS
Mar  3 15:38:38 rman-ss-03 kernel:         2 sd 1:0:0:0:
Mar  3 15:38:38 rman-ss-03 kernel:         command: Synchronize Cache(10): 35 00 00 00 00 00 00 00 00 00
Mar  3 15:38:38 rman-ss-03 kernel: : Current: sense key: Illegal Request
Mar  3 15:38:38 rman-ss-03 kernel:<<vendor>>  ASC=0x94 ASCQ=0x1ASC=0x94 ASCQ=0x1

These messages are coming  because of Synchronize Cache commands.  It
may be related to type of filesystem you are on. Did you have barrier
enabled on your filesystem. I see that these commands are going out
to target on passive paths.. I dont understand that part yet.
Normally scsi device handlers block commands going out passive
paths..This should be coming in a differrent path.. I still have to
figure that out..



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