please recommend a disk-exercising program?

Wojciech Puchar wojtek at
Sun Jun 7 11:38:25 UTC 2009

> Hello list,
> Can anyone please recommend to me a program that will stress-test a
> disk? If it matters, two are connected by firewire, another via usb.
> Filesystem is ufs. I think I have a disk that might be about to fail,
> but it only sometimes errors when under stress. I need to see if it

if it's about to fail then simply read it

dd if=/dev/disk of=/dev/null bs=1m

if it will not - disk is most probably OK.

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