Comment 4 for bug 163675

I confirm. System freezes for maybe 30 seconds here. syslog:

Dec 15 15:27:31 hopalong kernel: [ 4950.512000] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Dec 15 15:27:31 hopalong kernel: [ 4950.512000] ata1.01: cmd a0/00:00:00:00:20/00:00:00:00:00/b0 tag 0 cdb 0x25 data 8 in
Dec 15 15:27:31 hopalong kernel: [ 4950.512000] res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Dec 15 15:27:42 hopalong kernel: [ 4955.564000] ata1: port is slow to respond, please be patient (Status 0xd0)
Dec 15 15:27:42 hopalong kernel: [ 4960.560000] ata1: device not ready (errno=-16), forcing hardreset
Dec 15 15:27:42 hopalong kernel: [ 4960.560000] ata1: soft resetting port
Dec 15 15:27:42 hopalong kernel: [ 4960.920000] ata1.00: configured for UDMA/100
Dec 15 15:27:42 hopalong kernel: [ 4961.108000] ata1.01: configured for UDMA/25
Dec 15 15:27:42 hopalong kernel: [ 4961.108000] ata1: EH complete
Dec 15 15:27:42 hopalong kernel: [ 4961.124000] sd 0:0:0:0: [sda] 117210240 512-byte hardware sectors (60012 MB)
Dec 15 15:27:42 hopalong kernel: [ 4961.140000] sd 0:0:0:0: [sda] Write Protect is off
Dec 15 15:27:42 hopalong kernel: [ 4961.140000] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
Dec 15 15:27:42 hopalong kernel: [ 4961.164000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Dec 15 15:27:42 hopalong kernel: [ 4961.196000] sd 0:0:0:0: [sda] 117210240 512-byte hardware sectors (60012 MB)
Dec 15 15:27:42 hopalong kernel: [ 4961.212000] sd 0:0:0:0: [sda] Write Protect is off
Dec 15 15:27:42 hopalong kernel: [ 4961.212000] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
Dec 15 15:27:42 hopalong kernel: [ 4961.244000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA