Yet another RAID Question (YARQ)

P.U.Kruppa root at
Mon Jun 20 13:24:14 GMT 2005

On Mon, 20 Jun 2005, Ted Mittelstaedt wrote:

>> On Sun, 19 Jun 2005, Ted Mittelstaedt wrote:
>>> What model of Proliant?
>> ML 350 G4
> Oh good, we have a customer that has been looking at one of these
> for FreeBSD and I'm glad to hear that you didn't have problems with it.
Absolutely smooth - and I am really no kind of computer expert.

> With these all you get is hot-swap support although you might have
> to do a camcontrol rescan after swapping the disk.
Yes, I have read that in some recent thread.

> Actually, the Windows management tools for this raid controller on a
> server are observational as well.  There is no rebuild tool or anything
> like that.
> When we set these systems up
> for customers (All the recent Proliants use the same RAID controller)
> we usually configure them RAID-5 with 4 physical disks, the setup will
> set 3 of the disks in the array, and one a hot-spare.  And in the event
> of a disk failure, which you can tell by looking at the disk drive
> lights,
> or going into the management interface, you simply pull out the bad disk
> and put in the replacement and the RAID card takes care of the rest of
> it.
The City of Wuppertal couldn't buy me a third disc, because that 
would have superceded the limit of 2.5 kEURO, which would have 
required some special administrative act ... :-) .

> As for knowing if a disk has failed,
> I think the only way to know is to watch the little lights on the disk
> front.
After reading Alex' story about running a RAID 1 with a defect 
disc for three years, I believe it will suffice, when I check 
things with every system upgrade.


* Peter Ulrich Kruppa - Wuppertal - Germany * 

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