I'm trying to recover a Linux Software RAID5 array across 4 drives.
The unit is actually an Intel SS4200-E, which runs the EMC Lifeline (modified Linux distro).
I've been able to get into the OS via SSH, but I must admit that I am more of a Windows guy ...
So .. in order to use R-Studio to reconstruct the RAID5 array as a virtual array,
1) Disk Order
2) Block Size
3) Block Order
I've ran the "mdadm --misc --D" command
and it shows:
Here are some assumptions that I have made .. could someone please advise if I'm doing this correctly?# mdadm --misc --detail /dev/evms/md0vol1
Version : 00.90.03
Creation Time : Mon Nov 23 20:42:02 2009
Raid Level : raid5
Array Size : 351633407 (335.34 GiB 360.07 GB)
Used Dev Size : 117218176 (111.79 GiB 120.03 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Mon Nov 30 00:26:05 2009
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-asymmetric
Chunk Size : 32K
UUID : 123ea828:086246bb:1bf9851c:532994b0
Events : 0.4
Number Major Minor RaidDevice State
0 254 0 0 active sync /dev/evms/.nodes/sda1
1 254 1 1 active sync /dev/evms/.nodes/sdb1
2 254 2 2 active sync /dev/evms/.nodes/sdc1
3 254 3 3 active sync /dev/evms/.nodes/sdd1
I'm assuming that the "Chunk Size" is the "2) Block Size"??
the Block order as displayed above is "Left Asymetric",
does that mean that I shoudl use "Left Asynchronis" as 3) Block Order?
Super-Block is also set to persistent,
the Super-Block size, I found out, is 256Bytes + (2Bytes per Drive) = 256 + 8 = 264Bytes for my 4 drives RAID5
So .. the "4) Offset" should be 264??
Is this correct?
Are there any more linux commands out that can help me find the right parameters?
1) Drive Order i have a rough idea...
using the mdadm command, it said that
is there a Linux command that allows me to find out which drive (by drive size is fine) are they?
Any advice is Greatly appreciated!!