RE: Adding a disk to a RAID array

Liz, see questions below.

stew



[email protected] wrote:
> I am not sure where to start so I will just jump right in.  Up until
> last week I had the manual for the SCSI card in my hand and now it has
> managed to disappear.  I am still looking for it, although I have
> found a generic one from Adaptec that I have printed out and will go
> through. Hopefully I will be able to find out what I need to know
> concerning the hardware recognition of a new drive in the array.
>
> Hardware info:
> DPT (bought out by Adaptec) PM2654 I20 BIOS SmartRAID V controller
> card, firmware updated last April
> 3   SCSI Hard drives  36gb Segate
>
> Here's the problem:
>
> I have a SCSI hardware RAID array of 3 drives.  Space is running out

Liz:  You only show a single drive in your partition table below.  Please
provide a copy of your /proc/mdstat file for review.

> on the data partition of the array and I need to add another 36gb
> drive to the array. I think that all I need to do for the drive to be
> seen by the hardware is to install the drive and boot up however, I
> am still looking in to that.  Here is the partition information:
>                    start        end     mgb      part type     mounted
> /dev/sda
>    - sda1         1            9        71        ext3            boot
>    - sda2        10         270    2047      Linux-swap
>    - sda3       271        336     518       ext3            tmp
>    - sda4      337        8924   67366    Extended
>        - sda5  337         859    4103      ext3
>        - sda6  860        8924   6324      ext3            data
>
> I want to add the new drive space to the end of sda6 and into the
> mounted data partition but I have not been able to find out any
> information on how to do this.  I have looked through a stack of

What RAID level are you running or think you are running??

> books, asked those in the "know" here at work and no one seems to be
> able to tell me how to do it.  I know that I will have to back every
> thing up in the data partition before doing this.  I also know that I
> have to do something in fdisk.  I once did something like this to a
> non RAIDed Alpha Ultrex system about 6yrs ago but have no idea of how
> to proceeded here.  I am trying not to have to reinstall the entire
> system just to install a new drive.
>
> Assistance is greatly appreciated.
>
> Elizabeth R. E. Martin
> Network Support Specialist
> UT-Houston Medical School


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