Re: How to use another hard disk?

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On February 5, 2004 04:33 pm, Edward King wrote:
> I have two hard disk.I installed Red Hat 7.2 into the first hard disk,then
> I want to visited the data of second hard disk,I know I need to use command
> like follow : #mount /dev/sda   /mnt/seconddisk
>
> But I don't know the device number of second disk:
> #mount /dev/???   /mnt/seconddisk
>
> How to know it? What commands to use?
> Any idea will be appreciated!
>
> Edward


Hi Edward,
You imply both drives are scsi.
To see what drives and partitions are on the system use:
fdisk -l

You should see something like:
(as root)# fdisk -l
<snip...>
  Device Boot    Start       End    Blocks   Id  System
/dev/hdg1   *         1       203    102280+  83  Linux
/dev/hdg2           204     38144  19122264   83  Linux
/dev/hdg3         38145     39704    786240   82  Linux swap
<snip...>
   Device Boot    Start       End    Blocks   Id  System
/dev/hde1   *         1        13    104391   83  Linux
/dev/hde2            14      2624  20972857+  83  Linux
/dev/hde3          2625      4582  15727635   83  Linux
/dev/hde4          4583      9729  41343277+   f  Win95 Ext'd (LBA)
/dev/hde5          4583      4713   1052226   83  Linux
/dev/hde6          4714      4815    819283+  82  Linux swap


That shows I have 2 ide drives (/dev/hdg & /dev/hde). If you have two scsi 
drives you'll see something containing similar to:
/dev/sda & /dev/sdb
(the last letter (a, b, c...) may vary if you have other, non-disk, devises.)
The next digit is the partition, starting at 1. 
so /dev/hda2 is the second partition on the first physical disk.

If they are both scsi, to access the second disks first partition from 
/mnt/disk2, and if it is ext3, you would want to try:
mount -t ext3 /dev/sdb1 /mnt/disk2

As long as the mount point directory  exists (/mnt/disk2 in the example) and 
the filesystem is correct (try with no -t option if your not sure or if it is 
ext3), then that should work. You'll need to be root.

Once it is working, you can add it to fstab.

Hope that helps
-- 
Pete Nesbitt, rhce


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