I wanted to know if I could extend the size of a RAID5 array on the 3Ware 9650SE, so I tried something.
I first had this:
# tw_cli /c0 show Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy ------------------------------------------------------------------------------ u0 RAID-5 OK - - 256K 5587.9 RiW ON VPort Status Unit Size Type Phy Encl-Slot Model ------------------------------------------------------------------------------ p0 OK u0 1.82 TB SATA 0 - ST32000542AS p1 OK u0 1.82 TB SATA 1 - ST32000542AS p2 OK u0 1.82 TB SATA 2 - ST32000542AS p3 OK u0 1.82 TB SATA 3 - ST32000542AS p4 OK - 1.82 TB SATA 4 - ST32000542AS Name OnlineState BBUReady Status Volt Temp Hours LastCapTest --------------------------------------------------------------------------- bbu On Yes OK OK OK 0 xx-xxx-xxxx
A 4 disk raid 5 and one extra disk.
Then I did this:
# tw_cli /c0/u0 migrate type=raid5 disk=4
Sending migration message to /c0/u0 ... Done.
Then I have this:
# tw_cli /c0/u0 show Unit UnitType Status %RCmpl %V/I/M Port Stripe Size(GB) ------------------------------------------------------------------------ u0 Migrator MIGRATING - 0% - - - su0 RAID-5 OK - - - 256K 5587.9 su0-0 DISK OK - - p0 - 1862.63 su0-1 DISK OK - - p1 - 1862.63 su0-2 DISK OK - - p2 - 1862.63 su0-3 DISK OK - - p3 - 1862.63 su0/v0 Volume - - - - - 50 su0/v1 Volume - - - - - 5537.9 du0 RAID-5 OK - - - 256K 7450.54 du0-0 DISK OK - - p0 - 1862.63 du0-1 DISK OK - - p1 - 1862.63 du0-2 DISK OK - - p2 - 1862.63 du0-3 DISK OK - - p3 - 1862.63 du0-4 DISK OK - - p4 - 1862.63 du0/v0 Volume - - - - - N/A du0/v1 Volume - - - - - N/A
su0 and du0 are probably source and destination, giving me a new and bigger u0 at the end. But this is going to take a week to migrate, so I won’t know for a while… (edit: I contacted 3Ware support and they said the change in size is only seen after driver reload, which means a reboot in most cases).
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