with stress --hdd 1 the dmesg grows with this:
[ 2369.116568] ata1.00: configured for UDMA/100
[ 2369.116608] ata1: EH complete
[ 2369.515800] sd 0:0:0:0: [sda] 39070080 512-byte hardware sectors (20004 MB)
[ 2369.536382] sd 0:0:0:0: [sda] Write Protect is off
[ 2369.536404] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 2369.563311] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[ 2578.557332] ata1.00: limiting speed to UDMA/66:PIO4
[ 2578.557354] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
[ 2578.557363] ata1.00: BMDMA stat 0x25
[ 2578.557377] ata1.00: cmd c8/00:68:67:06:10/00:00:00:00:00/e2 tag 0 dma 53248
in
[ 2578.557381] res 51/84:01:ce:06:10/00:00:00:00:00/e2 Emask 0x10 (ATA
bus error)
[ 2578.557389] ata1.00: status: { DRDY ERR }
[ 2578.557394] ata1.00: error: { ICRC ABRT }
[ 2578.557441] ata1: soft resetting link
[ 2579.120584] ata1.00: configured for UDMA/66
[ 2579.120617] ata1: EH complete
[ 2579.506610] sd 0:0:0:0: [sda] 39070080 512-byte hardware sectors (20004 MB)
[ 2579.506727] sd 0:0:0:0: [sda] Write Protect is off
[ 2579.506733] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 2579.516236] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
--
System really slow like if no DMA from Edgy
https://bugs.launchpad.net/bugs/157286
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