Thanks for your reply.
Very interesting - I will definitely investigate this further.
Just a little more info on the actual computers:
I'm running these tests on 3 different machines in 2 different places
but the common component are the IBM hard drives. On the 2 machines at
work I have 4 x 20G IBM drives in a software raid5 and on the machine at
home I have 5 x 40G IBM drives in a software raid5 and 2 x 40G IBM
drives in a software raid0. The 4 drive array is in a machine at work
where it is airconditioned and it has a 200cm3/sec AC fan installed in
the case. The drives are spaced about 5mm apart between the top of one
drive and the bottom of the other. The 5 drive raid5 and 2 drive raid0
machine at home at the moment is not in an airconditioned room but the
case cover is off and the case has 2 x 200cm3/sec AC fans in it and for
good measure I also have a 40cm pedestal fan blowing air through the
case. The drives in this machine are spaced about 2cm apart from the
top of one drive to the bottom of the other. In both environments I
have never noticed hard drives that are hot to touch during any of the
tests. Therefore, it may not be the external temperature that I have to
worry about but the internal temperature of the drive. I'll try to get
a thermometer and measure the average external hard drive temperature
some time latter this week. Does anyone have any other ideas on this?
Michael, what hard drives are you running in your machine and what
spacings and what is the ambient temperature please. You can email this
directly if you wish as it is a little OT for this list I think.
> -----Original Message-----
> From: Michael Wahlbrink [SMTP:miw@xxxxxxxxxxxxxxxx]
> Sent: Monday, 10 September 2001 14:56
> To: adrian.head@xxxxxxxxxxxxxxx
> Cc: linux-xfs@xxxxxxxxxxx; owner-linux-xfs@xxxxxxxxxxx
> Subject: Re: Problems with many processes copying large
> directories across an XFS volume.
> On 10.09.2001 04:00:30 Adrian Head wrote:
> [....see subject...]
> Hi Adrian,
> I've had a quite similar phenomen last weekend. When copiing with many
> cp-processes on my xfs-volume i run into io errors or kernel oops.
> The solution was that the two disks of the Raidsystem are getting to
> hot when I
> run these extensive tests (30cp processes and 15 tar processes on
> thesame 60 GB
> raid 1 volume). Added another fan and all was fine ;-)...........