But isn't the default on the majority of ATA drives to have write cache
enabled ?
Also the LKML thread at
http://www.ussg.iu.edu/hypermail/linux/kernel/0304.1/0450.html
is very informative.
So my question is , how can one test if the journalled FS on his disk is
actually working
as it should or is it just waste of time and giving a false sense of safety
?
Regards,
David
----------
From: Alan Cox[SMTP:alan@redhat.com]
Reply To: fedora-test-list(a)redhat.com
Sent: 29. november 2003 1:46
To: fedora-test-list(a)redhat.com
Subject: Re: IDE write ordering ?
> The problem is , that is is hard to insure the wanted order of writes on
ATA
> disks.
> This is needed for journalled/logged filesystems for example.
IDE drives don't provide write order controls. End of story. Ext3 doesn't
care about this providing the drive isn't caching writes, it just wants to
be sure that an I/O completed before it is told it has. You control that
with hdparm to alter write caching if you are really paranoid.
Alan
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