Hi:
Dmesg with second timing value set to 1000 always, hotplugging WD 3TB drive:
[ 139.145917] ata5.00: exception Emask 0x10 SAct 0x0 SErr 0x4050000 action 0xf
[ 139.156180] ata5.00: SError: { PHYRdyChg CommWake DevExch }
[ 139.166619] ata5.00: hard resetting link
[ 139.166639] ata5.00: XXXX hardreset hotplugged = true
[ 139.166646] ata5.00: XXX0 hardreset debounce 25 500 2000
[ 139.166651] ata5.00: XXX1 hardreset debounce 25 1000 2000
[ 140.430401] ata5.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[ 140.430453] ata5.00: issuing IDENTIFY
[ 140.430480] ata5.00: IDENTIFY failed, irq_stat=0x60002 cerr=4
[ 140.430521] ata5.00: failed to IDENTIFY (I/O error, err_mask=0x11)
[ 140.430532] ata5.15: hard resetting link
[ 142.650047] ata5.15: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
[ 145.431276] ata5.00: hard resetting link
[ 145.431298] ata5.00: XXXX hardreset hotplugged = false
[ 145.431304] ata5.00: XXX0 hardreset debounce 5 100 2000
[ 145.431310] ata5.00: XXX1 hardreset debounce 5 1000 2000
[ 146.690413] ata5.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[ 146.690461] ata5.01: hard resetting link
[ 146.690481] ata5.01: XXXX hardreset hotplugged = false
[ 146.690487] ata5.01: XXX0 hardreset debounce 5 100 2000
[ 146.690492] ata5.01: XXX1 hardreset debounce 5 1000 2000
[ 147.940402] ata5.01: SATA link down (SStatus 0 SControl 320)
[ 147.940481] ata5.02: hard resetting link
[ 147.940501] ata5.02: XXXX hardreset hotplugged = false
[ 147.940507] ata5.02: XXX0 hardreset debounce 5 100 2000
[ 147.940513] ata5.02: XXX1 hardreset debounce 5 1000 2000
[ 149.190398] ata5.02: SATA link down (SStatus 0 SControl 320)
[ 149.190476] ata5.03: hard resetting link
[ 149.190497] ata5.03: XXXX hardreset hotplugged = false
[ 149.190503] ata5.03: XXX0 hardreset debounce 5 100 2000
[ 149.190508] ata5.03: XXX1 hardreset debounce 5 1000 2000
[ 150.440399] ata5.03: SATA link down (SStatus 0 SControl 320)
[ 150.440478] ata5.04: hard resetting link
[ 150.440499] ata5.04: XXXX hardreset hotplugged = false
[ 150.440505] ata5.04: XXX0 hardreset debounce 5 100 2000
[ 150.440510] ata5.04: XXX1 hardreset debounce 5 1000 2000
[ 151.690410] ata5.04: SATA link down (SStatus 0 SControl 320)
[ 151.690488] ata5.05: hard resetting link
[ 151.690509] ata5.05: XXXX hardreset hotplugged = false
[ 151.690515] ata5.05: XXX0 hardreset debounce 5 100 2000
[ 151.690520] ata5.05: XXX1 hardreset debounce 5 1000 2000
[ 152.940399] ata5.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320)
[ 152.940451] ata5.00: issuing IDENTIFY
[ 152.940477] ata5.00: IDENTIFY failed, irq_stat=0x60002 cerr=4
[ 152.940518] ata5.00: failed to IDENTIFY (I/O error, err_mask=0x11)
[ 152.940529] ata5.15: hard resetting link
[ 155.160047] ata5.15: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
[ 155.160327] ata5.00: hard resetting link
[ 155.160347] ata5.00: XXXX hardreset hotplugged = false
[ 155.160353] ata5.00: XXX0 hardreset debounce 5 100 2000
[ 155.160358] ata5.00: XXX1 hardreset debounce 5 1000 2000
[ 156.410398] ata5.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[ 157.940026] ata5.05: hard resetting link
[ 157.940048] ata5.05: XXXX hardreset hotplugged = false
[ 157.940054] ata5.05: XXX0 hardreset debounce 5 100 2000
[ 157.940059] ata5.05: XXX1 hardreset debounce 5 1000 2000
[ 159.190398] ata5.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320)
[ 159.190450] ata5.00: issuing IDENTIFY
[ 159.199553] ata5.00: ATA-8: WDC WD30EZRX-00MMMB0, 80.00A80, max UDMA/133
[ 159.199560] ata5.00: 5860533168 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 159.199702] ata5.00: issuing IDENTIFY
[ 159.205571] ata5.00: configured for UDMA/100
[ 159.205661] ata5: EH complete
[ 159.205857] scsi 4:0:0:0: Direct-Access ATA WDC WD30EZRX-00M 80.0 PQ: 0 ANSI: 5
[ 159.206297] sd 4:0:0:0: [sdb] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
[ 159.206305] sd 4:0:0:0: [sdb] 4096-byte physical blocks
[ 159.206319] sd 4:0:0:0: Attached scsi generic sg1 type 0
[ 159.206440] sd 4:0:0:0: [sdb] Write Protect is off
[ 159.206447] sd 4:0:0:0: [sdb] Mode Sense: 00 3a 00 00
[ 159.206519] sd 4:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 159.206938] sdb: sdb1 sdb2
[ 159.251508] sd 4:0:0:0: [sdb] Attached SCSI disk
[ 159.254218] ata5.00: issuing IDENTIFY
[ 159.330233] ata5.00: issuing IDENTIFY
[ 159.350570] ata5.00: issuing IDENTIFY
> -----Original Message-----
> From: Tejun Heo [mailto:htejun@xxxxxxxxx] On Behalf Of tj@xxxxxxxxxx
> Sent: Thursday, July 14, 2011 12:15 AM
> To: Derry Bryson
> Cc: linux-ide@xxxxxxxxxxxxxxx
> Subject: Re: Problem w/ hotplug on sata_sil24 w/ PMP (sil3726)
>
> Hello,
>
> On Wed, Jul 13, 2011 at 04:23:27PM +0000, Derry Bryson wrote:
> > [ 92.980476] ata1.02: IDENTIFY failed, irq_stat=0x60002 cerr=4
>
> The controller is saying that it failed to transmit command FIS
> because PHYRDY state changed, so that is PHY flickering. Can you
> please bump the second debounce timing to 1000 (not only the first one
> but always) and see whether the failure pattern changes?
>
> Thanks.
>
> --
> tejun
>
Derry Bryson
Sr. Software Engineer
Highly Reliable Systems
www.High-Rely.com
"Making Backup Invisible"
Phone: 775.329.5139 X129
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