3ware raid question
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Raz:
The 3ware (at least my 9500S-8) keeps the info about the disk and how
it fits into the RAID array on the disk; I think in the DCB is used for this. You can (and I have) unplug the disks, then connect them to different ports and the array will still work fine.
When you are adding a disk from a different array it probably has the
DCB from that array. This is conflicting with your new array. I would do as the Dan suggests, and clear the disk.
Jason.
Quoted 4 lines · Raz Ben-Jehuda(caro)
i have encountered a weired feature of 3ware raid. When i try to put inside an existing raid a disk which belonged to a different 3ware raid if fail. Any idea anyone ?
Two thoughts:
1) Maybe test the disk in another machine and see if it's still good
2) Maybe wipe the disk clean in another machine with something like:
dd if=/dev/zero of=/dev/sdb
...but be very careful to get the right disk (IE, you may not need /dev/sdb, you might need /dev/hdd or a number of other possibilities).
I know that some raid management information is save on the disks. But I am using 250 GB disks at minimum dd'ing this amount would be too long. Has know the exact position of where to dd ?
Quoted 36 lines · Jason Leach
Raz:
The 3ware (at least my 9500S-8) keeps the info about the disk and how
it fits into the RAID array on the disk; I think in the DCB is used for this. You can (and I have) unplug the disks, then connect them to different ports and the array will still work fine.When you are adding a disk from a different array it probably has the
DCB from that array. This is conflicting with your new array. I would do as the Dan suggests, and clear the disk.Jason.
Quoted 4 lines · Raz Ben-Jehuda(caro)
i have encountered a weired feature of 3ware raid. When i try to put inside an existing raid a disk which belonged to a different 3ware raid if fail. Any idea anyone ?
Two thoughts:
1) Maybe test the disk in another machine and see if it's still good
2) Maybe wipe the disk clean in another machine with something like:
dd if=/dev/zero of=/dev/sdb
...but be very careful to get the right disk (IE, you may not need
/dev/sdb, you might need/dev/hddor a number of other possibilities).
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Signature · 2 lines
Raz Long live the penguin