[nSLUG] USB stick for backup okay?

Dop Ganger nslug at fop.ns.ca
Tue Apr 3 20:15:04 ADT 2018

On Tue, 3 Apr 2018, Mike Spencer wrote:

> Digression: Still turning up problems with the IBM P4 box that's my
> main computer. Shipped with IDE drive but has 2 plugs on mobo for SATA
> drives.  After the IDE HD failure in 2016, replacement drive was SATA.
> Appeared to work fine.  But then found that large writes to HD (say,
> copy 1G from USB to HD) bogged the CPU down.  Also, playing a DVD
> video with mplayer causes the clock to fall behind ca. 6 sec. per
> minute of video.

An easy thing to check is whether you have multiple devices sharing an 
interrupt, which is nominally OK but slow interrupt handlers can lead to 
it not being OK. Run

watch -n .1 cat /proc/interrupts

in one terminal window then perform a slow operation in another and see if 
most of the interrupts are pegging one IRQ. A quick fix might be to switch 
which socket the SATA drive is plugged in to, or move USB devices around.

Cheers... Dop.

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