• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

Extend RAID 5 Array on 3ware 9650SE-8LPML?

K

KapsZ28

2[H]4U
Joined
May 29, 2009
Messages
2,114
Currently there are 4x 2 TB drives setup in RAID 5. I am trying to find out before purchasing more disks if it is possible to install one more 2 TB drive and extend the RAID 5 array without losing data? It seems that with LSI you can extend an existing RAID array, but this is a legacy 3ware adapter and it doesn't seem to support MegaCli. Just some 3ware CLI that I haven't really used before.

I did find this article. http://www.cyberciti.biz/files/tw_cli.8.html

And I see this.

Code: 
In the case of capacity expansion:

 $ tw_cli /c0/u3 migrate type=raid10 disk=10-11 stripe=16
Indicates that the destination unit has a RAID type of raid10 and has the disks 10 and 11 in addition to all the disks in the existing unit u3.

The following shows how migrating units would be displayed...

 3ware CLI> /c0 show

 Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache  AVrfy
 ------------------------------------------------------------------------------
 u0    RAID-5    OK             -       -       64K     596.004   ON     OFF
 u2    SPARE     OK             -       -       -       149.042   -      OFF
 u3    Migrator  MIGRATING      -       39      -       149.001   ON     OFF
 Port   Status           Unit   Size        Blocks        Serial
 ---------------------------------------------------------------
 p0     OK               u0     149.05 GB   312581808     WD-WCANM1771318
 p1     OK               u0     149.05 GB   312581808     WD-WCANM1757592
 p2     OK               u0     149.05 GB   312581808     WD-WCANM1782201
 p3     OK               u0     149.05 GB   312581808     WD-WCANM1753998
 p4     OK               u2     149.05 GB   312581808     WD-WCANM1766952
 p5     OK               u3     149.05 GB   312581808     WD-WCANM1882472
 p6     OK               u0     149.05 GB   312581808     WD-WCANM1883862
 p7     OK               u3     149.05 GB   312581808     WD-WCANM1778008
 p8     OK               -      149.05 GB   312581808     WD-WCANM1770998
 p9     NOT-PRESENT      -      -           -             -
 p10    OK               u3     149.05 GB   312581808     WD-WCANM1869003
 p11    OK               u3     149.05 GB   312581808     WD-WCANM1762464

 3ware CLI> /c0/u0 show

 Unit     UnitType  Status         %RCmpl  %V/I/M  Port  Stripe  Size(GB)
 ------------------------------------------------------------------------
 u3       Migrator  MIGRATING      -       39      -     -       -
 su3      RAID-1    OK             -       -       -     -       149.001
 su3-0    DISK      OK             -       -       p5    -       149.001
 su3-1    DISK      OK             -       -       p7    -       149.001
 su3/v0   Volume    -              -       -       -     -       149.001
 du3      RAID-10   OK             -       -       -     16K     298.002
 du3-0    RAID-1    OK             -       -       -     -       -
 du3-0-0  DISK      OK             -       -       p5    -       149.001
 du3-0-1  DISK      OK             -       -       p7    -       149.001
 du3-1    RAID-1    OK             -       -       -     -       -
 du3-1-0  DISK      OK             -       -       p10   -       149.001
 du3-1-1  DISK      OK             -       -       p11   -       149.001
 du3/v0   Volume    -              -       -       -     -       149.001

The above report indicates that /c0/u3 is a migrating unit with 39% completion. The report also indicate that Source Unit su0 is of type RAID-1 and Destination Unit du0 is of type RAID-10.

I know that is a bit different, but I am wondering it adding a spare 2 TB and using a similar command will expand on the existing RAID 5?
 
I've done it on that card. It worked fine just don't expect a lot of speed while the array is rebuilding. It fully rebuilds the array so the risk for data loss is there but that said RAID is not a backup. If data loss will come from array failure.
 
If you don't want to use the CLI, it's also possible to do this through the 3DM2 Web GUI.

Migration takes an extremely long time though. I remember 3x 2TB -> 4x 2TB RAID-5 taking just under 48 hours when I did it a few years ago on my 9650SE-8LPML.
 
You must log in or register to reply here.
Back
Top