I/O error

[Mad Unix]

the server is attached to SAN through 2xHBA's using RHEL5 multipath
I built a LUN0 (50G) with sdd/sdb expanded through another LUN(50G) sdc/sde
the /dev/dm-2 shows 100G space but on the same time the sdc/sde shows error
I/O

any help?

[root at linux1 ftp]# fdisk -l

Disk /dev/sda: 72.7 GB, 72746008576 bytes
255 heads, 63 sectors/track, 8844 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1           5       40131   de  Dell Utility
/dev/sda2   *           6        1543    12353985   83  Linux
/dev/sda3            1544        1556      104422+  83  Linux
/dev/sda4            1557        8844    58540860    5  Extended
/dev/sda5            1557        8844    58540828+  8e  Linux LVM

Disk /dev/sdb: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/sdd: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdd doesn't contain a valid partition table

Disk /dev/dm-2: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-2 doesn't contain a valid partition table

[root at linux1 ftp]# multipath -ll
360060160ddd01d0094a512bdfb8adc11dm-2 DGC,RAID 5
[size=100G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][active]
 \_ 1:0:0:0 sdb 8:16  [active][ready]
 \_ 2:0:0:0 sdd 8:48  [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 1:0:1:0 sdc 8:32  [active][ready]
 \_ 2:0:1:0 sde 8:64  [active][ready]

[root at linux1 ftp]# multipath -v2 -ll
360060160ddd01d0094a512bdfb8adc11dm-2 DGC,RAID 5
[size=100G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][active]
 \_ 1:0:0:0 sdb 8:16  [active][ready]
 \_ 2:0:0:0 sdd 8:48  [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 1:0:1:0 sdc 8:32  [active][ready]
 \_ 2:0:1:0 sde 8:64  [active][ready]

[root at linux1 ftp]# pvscan
  /dev/sdc: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdc: read failed after 0 of 4096 at 107374116864: Input/output error
  /dev/sdc: read failed after 0 of 4096 at 0: Input/output error
  /dev/sde: read failed after 0 of 4096 at 0: Input/output error
  /dev/sde: read failed after 0 of 4096 at 107374116864: Input/output error
  /dev/sde: read failed after 0 of 4096 at 0: Input/output error
  PV /dev/sda5   VG VolGroup00   lvm2 [55.81 GB / 0    free]
  PV /dev/dm-2   VG linux1       lvm2 [100.00 GB / 100.00 GB free]
  Total: 2 [155.81 GB] / in use: 2 [155.81 GB] / in no VG: 0 [0   ]

[root at linux1 ftp]# dmesg | tail
end_request: I/O error, dev sde, sector 0
Buffer I/O error on device sde, logical block 0
sd 2:0:1:0: Device not ready: <6>: Current: sense key: Not Ready
    Additional sense: Logical unit not ready, manual intervention required
end_request: I/O error, dev sde, sector 209715192
Buffer I/O error on device sde, logical block 26214399
sd 2:0:1:0: Device not ready: <6>: Current: sense key: Not Ready
    Additional sense: Logical unit not ready, manual intervention required
end_request: I/O error, dev sde, sector 0
Buffer I/O error on device sde, logical block 0


-- 
madunix