Carl Brewer <carl%bl.echidna.id.au@localhost> writes: [wrapping of log lines repaired] > wd0 at atabus0 drive 0 > wd0: <Hitachi HDS721010DLE630> > wd0: drive supports 16-sector PIO transfers, LBA48 addressing > wd0: 931 GB, 1938021 cyl, 16 head, 63 sec, 512 bytes/sect x 1953525168 sectors > wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) > wd0(ahcisata0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 > (Ultra/133) (using DMA) > wd1 at atabus1 drive 0 > wd1: <Hitachi HDS721010DLE630> > wd1: drive supports 16-sector PIO transfers, LBA48 addressing > wd1: 931 GB, 1938021 cyl, 16 head, 63 sec, 512 bytes/sect x 1953525168 sectors > wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) > wd1(ahcisata0:2:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 > (Ultra/133) (using DMA) That's what I meant - your first example was missing the "using" line, and presumably the interface was using PIO mode. It seems buggy not to have printed what it was using, though. > # iostat 5 > tty wd0 wd1 raid0 CPU > tin tout KB/t t/s MB/s KB/t t/s MB/s KB/t t/s MB/s us ni sy in id > 1 50 63.99 1139 71.21 63.48 1154 71.52 24.45 13 0.314 0 0 0 1 99 > 0 86 64.00 2677 167.3 64.00 2676 167.3 16.00 0 0.000 0 0 1 2 97 That is indeed the expected speed. All that said, I'm not sure what advice to give about the timeout. It may be that PIO mode is flaky, and the disk is really ok. Or not.
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