isw on Dell 8400 with 4 drives

[Matthijs Melchior]

Heinz Mauelshagen wrote:

>On Sat, Nov 27, 2004 at 12:33:24AM +0100, Matthijs Melchior wrote:
>  
>
>>L.S.,
>>
>>
>>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.
>>    
>>
>
>Matthijs,
>
>see the metadata definitions for raid_dev and raid_set, how those get
>silled in in isw.c and used by activate.c.
>  
>
OK, I will investigate that....

>Support for degraded RAID1 set resynchronization can be worked in, support
>for AAID3 not because of no RAID3 device-mapper target yet.
>
It would be a start to just activate a degraded RAID1 set with just 1 disk,
and not remove it.

I do not understand where this remark about RAID3 is comming from,
currently, I am only interrested in RAID0 and RAID1......

>Heinz
>  
>
..........

-- 
Regards,
----------------------------------------------------------------  -o)
Matthijs Melchior                                       Maarssen  /\\
mmelchior at xs4all.nl                                  Netherlands _\_v
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