linux-kernel - Re: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <471DC52B.20802@gmail.com>
Date:	Tue, 23 Oct 2007 18:55:55 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Steen Eugen Poulsen <sep@...-world.net>
CC:	Andrew Morton <akpm@...ux-foundation.org>, lists@...ted.dk,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen

Hello,

Steen Eugen Poulsen wrote:
> Sep 28 04:32:40 locker ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0
> action 0x2 frozen
> Sep 28 04:32:40 locker ata1.00: cmd b0/d2:f1:00:4f:c2/00:00:00:00:00/00
> tag 0 cdb 0x0 data 123392 in
> Sep 28 04:32:40 locker res 50/00:f1:00:4f:c2/00:00:00:00:00/00 Emask
> 0x202 (HSM violation)
[--snip--]
> Another machine:
> 
> Sep 28 03:47:55 dragonslair ata1.00: exception Emask 0x0 SAct 0x0 SErr
> 0x0 action 0x2 frozen
> Sep 28 03:47:55 dragonslair ata1.00: cmd
> b0/db:f8:00:4f:c2/00:00:00:00:00/00 tag 0 cdb 0x0 data 126976 in
> 
> Sep 28 03:47:55 dragonslair res 50/00:f8:00:4f:c2/00:00:00:00:00/00
> Emask 0x202 (HSM violation)
[--snip--]
> Sep 28 04:33:52 liferaft kernel: ata1.00: exception Emask 0x0 SAct 0x0
> SErr 0x0 action 0x2 frozen
> Sep 28 04:33:55 liferaft kernel: ata1.00: cmd
> b0/d2:f1:00:4f:c2/00:00:00:00:00/00 tag 0 cdb 0x0 data 123392 in
> Sep 28 04:33:55 liferaft kernel:          res
> 50/00:f1:00:4f:c2/00:00:00:00:00/00 Emask 0x202 (HSM violation)
> Sep 28 04:33:55 liferaft kernel: ata1: soft resetting port
> Sep 28 04:33:55 liferaft kernel: ata1: SATA link up 3.0 Gbps (SStatus
> 123 SControl 300)
> Sep 28 04:33:55 liferaft kernel: ata1.00: configured for UDMA/133
> Sep 28 04:33:55 liferaft kernel: ata1: EH complete

All these are caused by smartd.  Updating should fix the problem.

> Note 2: The hardware didn't freeze for me and I believe the freeze is do
> to swap breaking due to the errors.

Above HSM violations should be harmless other than those messages.
libata resets the devices and should just go on.

> Note 3: dragonslair's harddisk actually crashed, kernel didn't die, it
> just remounted read only. Reboot and the disk was missing, more reboot
> and the machine started with all disks running again, been stable since
> the 28th Sep. (knock on wood)

libata EH can't really recover from actual hardware failures but some
drives come back on if you hot unplug and then replug it.

-- 
tejun
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/