3ware migrate/resize/extend crap


turns out you can’t migrate/resize/extend a 3ware lun without adding disks, at least on a 9650se controller.  i had 4x 750gb disks attached to a controller, no free slots.  i replaced one by one with 1.5tb disks.  i wanted to extend the 2.05tb lun to 4.0tb but the software won’t let you do it.

[root@schitzo src]# ./tw_cli
//schitzo> /c2 show

Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy
u0   RAID-5   OK     -      -      64K    2095.44  ON    OFF

Port Status Unit Size    Blocks     Serial
p0   OK     u0   1.36 TB 2930277168 x
p1   OK     u0   1.36 TB 2930277168 y
p2   OK     u0   1.36 TB 2930277168 z
p3   OK     u0   1.36 TB 2930277168 a

//schitzo> /c2/u0 show

Unit    UnitType Status %RCmpl %V/I/M Port Stripe Size(GB)
u0      RAID-5   OK     -      -      -    64K    2095.44
u0-0    DISK     OK     -      -      p1   -      698.481
u0-1    DISK     OK     -      -      p2   -      698.481
u0-2    DISK     OK     -      -      p0   -      698.481
u0-3    DISK     OK     -      -      p3   -      698.481
u0/v0   Volume   -      -      -      -    -      2095.44

//schitzo> /c2/u0 migrate type=raid5 disk=0:3
Error: (CLI:008) Invalid ID specified. Found a specified ID already in use.

lame.  time to destroy, create, mount, and restore.

Categories : geek


  1. did you try without specify disk=0:3? you specify only new disks with the migrate command, not existing disks. maybe that would’ve worked?

    jack1337, September 26, 2012
  2. Sorry to resurrect this topic but I am wondering the same thing. I don’t want to go buy disks if I can’t do this. Any luck here? I don’t have anywhere else with enough space to rebuild the array =(

    Justin, January 24, 2016
  3. justin – i gave up, bought a 5th drive large enough to hold all my files. i copied everything to the 5th drive and rebuilt. my 9650se is collecting dust since november, i built a new server. 2-drive mdraid1.

    another option is to just buy another controller for the new drives and migrate data that way. used/refurn 9650se cards cam be had for $20-40 usd.

    Nick, February 21, 2016

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