isw on Dell 8400 with 4 drives

Matthijs Melchior mmelchior at
Fri Nov 26 23:33:24 UTC 2004


The RAID config on my Dell 8400, as set by BIOS and Win-XP is:

Intel(R) Application Accelerator RAID Option ROM v4.0.0.6211
Copyright(C) 2003-04 Intel Corporation.  All Rights Reserved.

  RAID Volumes:
  ID   Name             Level              Strip  Size     Status      Bootable
  0    ARRAY            RAID1(Mirror)      N/A    149.0GB  Normal      Yes
  1    ARRAY2           RAID1(Mirror)      N/A    74.5GB   Degraded    Yes
  2    ARRAY3           RAID3(Stripe)      128KB  149.0GB  Failed      No

  Physical Disks:
  Port Drive Model      Serial #                  Size     Type/Status(Vol ID)
  0    WDC WD1600JD-75H WD-WMAL91264840           149.0GB  Member Disk(0)
  1    WDC WD1600JD-00H WD-WMAL91985532           149.0GB  Member Disk(1,2)
  2    WDC WD1600JD-75H WD-WMAL91409154           149.0GB  Member Disk(0)
  3    WDC WD1600JD-00H WD-WMAL91887644           149.0GB  Non-RAID Disk

Press <CTRL-I> to enter Configuration Utility.........

RAID volume 0 is a RAID1 set of two full disks, port 0 and port 2
RAID volume 1 is a RAID1 set of half of two disks, port 1 and port 3
RAID volume 2 is a RAID0 set of the orher half of two disks, port 1 and port 3

The RAID info on disk 3 has been erased, which causes the Degraded and Failed
states for volumes 1 and 2.   Linux has been installed on disk 3.

The Linux system is running kernel 2.6.10-rc1, which has a working ahci module.

'dmraid' has the following view on this machine:

++ dmraid -V
dmraid version:                 1.0.0-rc5f (2004.11.24)
dmraid library version: 1.0.0-rc5f (2004.11.24)
device-mapper version:  4.1.0
++ dmraid -b
/dev/sda:    312500000 total, "WD-WMAL91264840"
/dev/sdb:    312581808 total, "WD-WMAL91905532"
/dev/sdc:    312500000 total, "WD-WMAL91409154"
/dev/sdd:    312581808 total, "WD-WMAL91887644"
++ dmraid -r
/dev/sda: isw, "isw_ebdcfejfgd", GROUP, ok, 312499998 sectors, data@ 0
/dev/sdb: isw, "isw_dbiacddhid", GROUP, ok, 312581805 sectors, data@ 0
/dev/sdc: isw, "isw_ebdcfejfgd", GROUP, ok, 312499998 sectors, data@ 0
++ dmraid -s -g
isw: unsupported map state 0x2 on /dev/sdb for ARRAY2
ERROR: adding /dev/sdb to RAID set "isw_dbiacddhid"
ERROR: removing RAID set "isw_dbiacddhid"
*** Superset
name   : isw_ebdcfejfgd
size   : 624999996
stride : 0
type   : GROUP
status : ok
subsets: 1
devs   : 2
spares : 0
--> Subset
name   : isw_ebdcfejfgd_ARRAY
size   : 312499200
stride : 256
type   : mirror
status : ok
subsets: 0
devs   : 2
spares : 0


It is unfortunate dmraid does not yet know about degraded RAID1 sets....

I want to help getting support for this, and for resyncing the device,
in dmraid.

Please give me some hints on how to proceed.


----------------------------------------------------------------  -o)
Matthijs Melchior                                       Maarssen  /\\
mmelchior at                                  Netherlands _\_v
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