Yes and no.

You can combine two disks to get a bigger disk (RAID 0 striping) but as fas
as I know you can't do it without destroying the data on the disks.

RAID 0 also has a reputation for losing stuff - if one disk goes down, the
combo goes down with it.
>From what I remember about striping, the cylinders are alternated so that
cylinder 20 (eg) on the combo might be composed of  cylinder 20 from disk 1
and cylinder 20 from disk 2.
Since the original files may have been written contiguously from (say)
cylinder 20 head 1 then head 2 then head 3, I don't see how this can be
translated on the fly into a read from disk 1 cyl 20 hd 1 then disk 2  cyl
20 hd 1 then disk 1 cyl 20 hd 2 etc (alternating disk selections).

Now that's the theory (please feel free to correct me - this is just off the
top of my head).
In practice I have NEVER tried striping disks. The concept gives me the
willies - just think, lose one platter and you lose the lot.

A better proposal would be to plug the new drive in, configure it as a
separate unit and stick a simlink in on the first filesystem that points to
a directory on the second disk.
If you really have to have it all in one directory, you might be better off
getting a new, bigger disk.

Regards,

Jill.

___________________________________________
Jill Rowling
Senior Design Engineer & Unix System Administrator
Electronic Engineering Department, Aristocrat Technologies
3rd Floor, 77 Dunning Ave Rosebery NSW 2018
Phone:  (02) 9697-4484          Fax:    (02) 9663-1412
Email:  [EMAIL PROTECTED]




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