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Re: IDE write cache and journaling file systems

To: Seth Mos <knuffie@xxxxxxxxx>
Subject: Re: IDE write cache and journaling file systems
From: Jim Buzbee <James.Buzbee@xxxxxxxxxxxx>
Date: Thu, 18 Apr 2002 12:32:45 -0600
Cc: XFS List <linux-xfs@xxxxxxxxxxx>
References: <4.3.2.7.2.20020418190239.03b5cc20@pop.xs4all.nl>
Sender: owner-linux-xfs@xxxxxxxxxxx
Seth Mos wrote:
> 
> At 09:28 18-4-2002 -0600, Jim Buzbee wrote:
> 
> >We've got a bit of an issue. From conversations on this list over the
> >last few months, it appears as if enabling the write cache on an IDE
> >drive is a "bad thing" when using a journaling file system such as XFS.
> >But, when talking to drive manufacturers, we are told that if the write
> >cache is disabled, the life of the drive is substantially reduced.  This
> >puts us in a bit of a hard place. We have little choice but to turn the
> >write cache on.
> 
> If that was so a lot of disks would be failing these days. It's all nice
> and dandy but if your power supply goes, your filesystem integrity will go
> with it.

Anyone know what are the Linux distributions are doing by default?  Now
that they are including journaling filesystems as an option, I wonder if
they turn write caching off on IDE drives. 

Jim



> 
> I have never had write cache on any of my disks enabled and I have so far
> lost just 4 disks of the 12 over the last 6 years. 2 of which were from a
> _really_ bad seagate series drive.
> 
> So far all the maxtor drives I have are still alive.
> I also have 1 out of 3 IBM deskstar disks which is beginning to fail after
> 1,5 years.
> 
> Repeatingley switching disks on and off is not really good for the disk 
> either.
> Workaround: Don't use the disk.
> 
> ;)
> 
> Cheers
> 
> --
> Seth
> It might just be your lucky day, if you only knew.


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