RAID5 problem on M4100

[verdurin]

I've been asked to help with a Snap M4100 that won't mount its main RAID5 array. Here's the output of 'co de info':

Logical Device: 10006 Position: 0 JBOD Size (KB): 32296 Free (KB): 23936 Private Mounted
Label:Private Contains system files only
Unique Id: 0x0B81845627DE9ADB Mount: /priv Index: 12 Order: 0
Partition: 10006 Physical: 10007 FS Size (KB): 32768 Starting Blk: 515 Private
Physical: 10007 Drive Slot: 0 IDE Size (KB): 58633216 Fixed

Logical Device: 1000E Position: 0 JBOD Size (KB): 32296 Free (KB): 23936 Private Mounted
Label:Private Contains system files only
Unique Id: 0x78A70BAE75FE3900 Mount: /pri2 Index: 13 Order: 1
Partition: 1000E Physical: 1000F FS Size (KB): 32768 Starting Blk: 515 Private
Physical: 1000F Drive Slot: 1 IDE Size (KB): 58633216 Fixed

Logical Device: 10018 Position: 1 ORPHAN Size (KB): 58171912 Free (KB): 0 Public Unmounted
Labelrive4 Orphan from EMPGU-SNAP1 - RAID5
Unique Id: 0x3C2C59DF4A716206
Partition: 10018 Physical: 1001F ORPHAN Size (KB): 58171912 Starting Blk: 57535 Public
Physical: 1001F Drive Slot: 3 IDE Size (KB): 58633216 Fixed

Logical Device: 60000 Position: 2 RAID_CRACKED Size (KB): 174515736 Free (KB): 0 Public Unmounted
Label:RAID5 Large data protection disk
Unique Id: 0x3C2C59DF4A716206 Mount: /0 Index: 0 Order: 255
Partition: 10000 Physical: 10007 R 60000 Size (KB): 58171912 Starting Blk: 57535 Public
Physical: 10007 Drive Slot: 0 IDE Size (KB): 58633216 Fixed
Partition: 10010 Physical: 10017 R 60000 Size (KB): 58171912 Starting Blk: 57535 Public
Physical: 10017 Drive Slot: 2 IDE Size (KB): 58633216 Fixed
Partition: 10008 Physical: 1000F R 60000 Size (KB): 58171912 Starting Blk: 57535 Public
Physical: 1000F Drive Slot: 1 IDE Size (KB): 58633216 Fixed

So far as I can tell from putting the drives into another machine, three of the drives are fine (no hardware errors). The fourth one wasn't detected on the other machine but seems to have been detected by the Snap OS.

Here's the disk log for the array:
E File System Check : FSCK fatal error = 30 Disk 60000 8/22/2007 3:50:54 PM
E File System Check : Unknown file type I=34590 Type = 0x130E Disk 60000 8/22/2007 3:50:54 PM
W File System : 1 member(s) missing in logical device (original ID: 60000) Disk 60000 8/22/2007 3:50:48 PM
E File System : Logical set member 2 not found. Original device ID: 60000 Disk 60000 8/22/2007 3:50:48 PM


Is there any way I can rescue this array?

[blue68f100]

Drive 4 is the problem child. Is the front panel reporting drive 4 failure? I would remove it then start the unit up.

The unit should run in degrade mode with just 3 drives. It should mount the array, if you did not damage them putting in another machine. Sometimes depending on usage it may take some time for it to mount, up to 30-45min. So if it's not going into panic give it time it should come online. If after an hour it does not mount try doing a reset to factory. You will need to have to use Assit to do the initial setup.

Have you read the notice on 4100's at the top of the threads? Need to know if your MB has been modified/repaired. You are setting on the 240gig units that have problems.

[verdurin]

I had already tried with drive 4 removed, but nothing seemed to be happening. I'll give it another go.

When I did try that it didn't run in degraded mode, it just kept the array offline. However, I didn't know you had to leave it a while.

Thanks for the reply.