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



I have a MD3200 setup with multipathd running RHEL 5.5.

The array is split into 2 virtual disk, each assigned to one of the RAID controllers.

I believe I have the drivers setup properly, including scsi_dh_rdac.

multipath.conf has been customized by the Dell software install as follows:

blacklist {
        device {
                vendor  "*"
                product "Universal Xport"
        }
}
defaults {
        user_friendly_names yes
        max_fds             8192
}
devices {
        device {
                vendor                "DELL"
                product               "MD32xxi"
                path_grouping_policy  group_by_prio
                prio                  rdac
                polling_interval      5
                path_checker          rdac
                path-selector         "round-robin 0"
                hardware_handler      "1 rdac"
                failback              immediate
                features              "2 pg_init_retries 50"
                no_path_retry         30
                rr_min_io             100
                prio_callout          "/sbin/mpath_prio_rdac /dev/%n"
        }
        device {
                vendor                "DELL"
                product               "MD32xx"
                path_grouping_policy  group_by_prio
                prio                  rdac
                polling_interval      5
                path_checker          rdac
                path-selector         "round-robin 0"
                hardware_handler      "1 rdac"
                failback              immediate
                features              "2 pg_init_retries 50"
                no_path_retry         30
                rr_min_io             100
                prio_callout          "/sbin/mpath_prio_rdac /dev/%n"
        }
}


$ multipath -ll mpath8
mpath8 (36842b2b000528f62000005e04d25d3e7) dm-4 DELL,MD32xx
[size=20T][features=3 queue_if_no_path pg_init_retries 50][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
 \_ 2:0:0:1  sdf 8:80  [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 1:0:0:1  sdc 8:32  [active][ghost]

$ multipath -ll mpath9
mpath9 (36842b2b0005294f9000005da4d25d3fb) dm-5 DELL,MD32xx
[size=20T][features=3 queue_if_no_path pg_init_retries 50][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
 \_ 1:0:0:2  sdd 8:48  [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 2:0:0:2  sdg 8:96  [active][ghost]


I have LVM striping extents between these two disks. There are 4 10T lvols, for example:

$ lvdisplay -m /dev/rmane/d01
  --- Logical volume ---
  LV Name                /dev/rmane/d01
  VG Name                rmane
  LV UUID                6sQcuN-AaG7-EaIN-njz1-LHfB-LlWk-SOfZZE
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                10.00 TB
  Current LE             1311210
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     65536
  Block device           253:8

  --- Segments ---
  Logical extent 0 to 1311209:
    Type                striped
    Stripes             2
    Stripe size         8192 KB
    Stripe 0:
      Physical volume   /dev/dm-4
      Physical extents  1311210 to 1966814
    Stripe 1:
      Physical volume   /dev/dm-5
      Physical extents  1311210 to 1966814

I am using ext4 in each of the 4 lvols.

Today, I have started coping some data (about 200GB) to one of these volumes (via rsync) and I've noticed a large number of errors from the kernel:

Feb 28 14:24:20 rman-ss-03 kernel: FAILED
Feb 28 14:24:20 rman-ss-03 kernel: status = 1, message = 00, host = 0, driver = 08 Feb 28 14:24:20 rman-ss-03 kernel: <6>sd: Current: sense key: Illegal Request Feb 28 14:24:20 rman-ss-03 kernel: <<vendor>> ASC=0x94 ASCQ=0x1ASC=0x94 ASCQ=0x1

These are repeating every 1-2 seconds (a total of 2526 times) during the 111 minutes it took to complete the copy.


My best efforts of researching this error have lead me to this thread:

https://www.redhat.com/archives/dm-devel/2009-September/msg00311.html


I don't have any issues during boot and I'm not sure where to go from here.

Any suggestions would be appreciated.

Thanks,


-Charles



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