From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: linux-raid@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: Why does the md/raid subsystem does not remap bad sectors in a raid array?
Date: Sat, 22 Nov 2008 19:02:39 -0500 (EST) [thread overview]
Message-ID: <alpine.DEB.1.10.0811221859210.14817@p34.internal.lan> (raw)
I asked before but it was kind of clobbered in the velociraptor mess:
On a colleague's box:
Aug 02, 2008 12:15.30AM(0x04:0x0023): Sector repair completed: port=7,
LBA=0x4A0387F5
SMART Self-test log structure revision number 0
Warning: ATA Specification requires self-test log structure revision
number = 1
Num Test_Description Status Remaining
LifeTime(hours) LBA_of_first_error
# 1 Extended offline Completed: read failure 90% 305
1241745397
Even though this disk has a bad sector:
198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline
- 1
The controller does not drop the drive from the array when it hits an
error, the 3ware card "takes care of it" and the user need not worry about
it, whereas with md/raid every time it hits a bad sector, it breaks the
raid and it goes degraded, is this correct? Will/can something like what
3ware does be possible in a sw-raid based configuration or is a HW raid
card required?
Justin.
next reply other threads:[~2008-11-23 0:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-23 0:02 Justin Piszcz [this message]
2008-11-23 0:13 ` Why does the md/raid subsystem does not remap bad sectors in a raid array? Jon Nelson
2008-11-23 1:44 ` Robert Hancock
2008-11-23 4:34 ` Brad Campbell
2008-11-23 12:20 ` Henrique de Moraes Holschuh
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