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Posted on 2004-08-02
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Greetings all,

I have a poweredge 1600SC with a single channel U160 Raid controller (with 143GB x 3 hot swappable SCSI hd). I am running redhat 9 on this machine. My problem is im running out of space and want to add and additional 2 SCSI hard disk with the same capacity. What do i do? Since it is hot swappable do i just shut down the machine install the 2 hard disk and restart? or are there some configuration needed to be done to it.


Thank you for your time.

Regards,
MC02 (newbie)
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by:jmckinney2
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If you are currently using a single drive, and have two empty bays, you can certainly install new drives in the empty spaces.

Before you do ANYTHING else, back up your data.

You will need to add the drives to your existing container in the Array Management utility, which you can access either from the RAID BIOS at startup or through the web-based server management tool that Dell publishes for Red Hat systems. You can download that tool here:

http://support.dell.com/support/downloads/type.aspx?c=us&cs=_84&l=en&s=slg&SystemID=PWE_PNT_XEO_1600SC&category=0&os=LN90&osl=en&deviceid=2331&devlib=36

You should be able to migrate your single drive container to a RAID 0 or RAID 5 container using all three drives. I don't recommend using RAID 0, since the loss of one drive will mean the loss of all of your data.

Once you've done that, You should end up with a bunch of free space on your disk device, and you can create and mount a new filesystem.

Jason
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by:mc02
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Thanks Jason for reply,

I actually have 3 SCSI hard disk already installed. I have 3 empty bays left. Ill be placing 2 additional hard disk with the same capacity.
I currently set the RAID to RAID 5. I used the Array Management Utility, turn the new hard disks online and intialized them.
I still can not see the new hard disks on my server therefore i can not mount it. What can i do? Do i need to format it after initialisation?

Thank you for you time.

Regards,
MC02
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jmckinney2 earned 125 total points
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Initializing the new drives is the first step. After you initialize them, you will need to either add them to the existing RAID 5 container (this is often called migrating), or create a new container for the two new drives. You will do this within the Array Manager.

Look at the contents of /etc/fstab, and note the names of the partitions that are currently being used on your system. If I recall Red Hat 9 correctly, these will look like /dev/sda1, /dev/sda2, etc. If you create a new container for the two new drives, the new container should show up as /dev/sdb. If you migrate the existing container, you are adding new space to /dev/sda. Use fdisk or cfdisk to configure new linux partitions on the disk device, and finally run mkfs to format the partitions. After that, you should be able to mount them.

If this doesn't make a whole lot of sense, post your /etc/fstab file and I can try to make sense of it.

Jason
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by:mc02
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Hey Jason,

Made a blunder outta my server. One of my staff accidentally cleared the configuration on the PERC now it wont boot properly. Error read "No logical drive". I took ur advice and backed up on DLT tapes. Is there anyway to restore my server back without having to reformat everything and restoring it from the DLT tapes?

Regards
MC
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