Bug 700325 - man page of mount missing the discard option for ext4
Summary: man page of mount missing the discard option for ext4
Keywords:
Status: CLOSED NEXTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: util-linux-ng
Version: 6.0
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Karel Zak
QA Contact: qe-baseos-daemons
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-04-28 07:02 UTC by Kirby Zhou
Modified: 2011-04-29 14:19 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-04-29 14:19:00 UTC
Target Upstream Version:

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Description Kirby Zhou 2011-04-28 07:02:21 UTC 
Description of problem:

At present, ext4 is the only fully-supported file system that supports TRIM. To enable TRIM commands on a device, use the mount option discard. For example, to mount /dev/sda2 to /mnt with TRIM enabled, run:
mount -t ext4 -o discard /dev/sda2 /mnt
By default, ext4 does not issue the TRIM command. This is mostly to avoid problems on devices which may not properly implement the TRIM command. The Linux swap code will issue TRIM commands to TRIM-enabled devices, and there is no option to control this behaviour.

BUY man page of mount missing the discard option for ext4.


Version-Release number of selected component (if applicable):

util-linux-ng-2.17.2-6.el6.x86_64
Comment 2 RHEL Program Management 2011-04-29 06:00:54 UTC 
Since RHEL 6.1 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.
Comment 3 Karel Zak 2011-04-29 14:19:00 UTC 
This will be fixed in the pending RHEL6.1 update.
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