[Beowulf] Re: OT: LTO Ultrium (3) throughput?
brett at worth.id.au
Wed Jun 18 21:31:02 EDT 2008
"David Mathog" wrote:
> dd if=/dev/zero of=/dev/nst0 bs=8192 count=10000
>only moves 21.3MB/sec.
Are you using LTO-3 tapes? An older gen tape could do it.
Also I have seen instances where /dev/zero is no longer a device but has turned into
a file. Maybe a big file due to an incorrect "dd of=" option at some stage. From then on
your dd tests would be measuring your root disk performance.
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