Hello. This is not my machine - a client had it operating quietly for 10+ years without backup. Hurray! It has 4 x 147GB SCSI 68pin drives in a RAID 5 array.
Anyways, things were supposedly going swimmingly, until they moved the server - after which, it stopped booting and flashed an NVRAM mismatch. OK, the adapter lost its setting - cool. When they brought it to me, they explained that a Dell support rep (warranty? still?) had helped him try to retag the array as 64KB stripe in a RAID 5 array - OK. This isn't a critical system, and it's not the end of the world if it is lost. I tried retagging from disk, but that didn't help - it still wouldn't boot.
I cloned all 4 drives with a spare SCSI non-RAID card before continuing, of course.
Anyways, I'm at my whits' end trying to rebuild this thing - no tagging combination seems to work! I boot from a linux live CD with each attempt, and take a peek at the partition table - which looks OK; however upon read-only mounting of the filesystem I run into I/O errors, and broken images - basically what you'd see on a bad stripe config. There is about 400MB visible on a disk that should have half of its ~420GB used!
Interestingly, none of the other stripe options bring up a workable partition table or mountable filesystem. I've had no luck with the original images either - both R-Studio and RAID Reconstructor find nothing.
So all that being said - do you guys have suggestions for how this RAID should be built? Right now it's 4 disks, RAID 5 with 64KB stripe (all other options like UREADAHEAD are default). There are only two strange things that stand out to me:
1) The PERC channel listing for the physical disks are all spread-out; rather than 0-3 it's 1, 2, 5 and 8 slots on channel 0 for the drives? Seems weird.
2) The partition table is as follows:
1 Primary partition with 30GB (Windows), followed by an Extended partition, which contains a partition within that has the rest of the data on it (formerly the Data drive). Just a weird way to set it up, I guess? Supposedly this has remained unchanged since the factory shipped it all those years ago.
Any ideas? Thanks for your time.