On Sunday, October 06, 2019 04:32:36 AM Pascal Hambourg wrote:
> Le 05/10/2019 à 21:12, Reco a écrit :
> >>> The way I heard it, to trigger the corruption one should issue TRIM
> >>> asynchronously *and* utilize NCQ for it. fstrim is synchronous.
> >>
> >> Asynchronous and synchronous to what ?
>
Le 05/10/2019 à 21:12, Reco a écrit :
The way I heard it, to trigger the corruption one should issue TRIM
asynchronously *and* utilize NCQ for it. fstrim is synchronous.
Asynchronous and synchronous to what ?
To SSD's I/O queue.
Can you explain what it means or provide any pointers ?
Hi.
On Sat, Oct 05, 2019 at 11:12:06PM +0200, deloptes wrote:
> Reco wrote:
>
> > Curious. I avoid RAID5/6 due to the old habit, but it's something that's
> > good to go.
>
> But what do you use? RAID5 is most efficient for building large arrays -
> what is the alternative?
RAID10 if
Reco wrote:
> Curious. I avoid RAID5/6 due to the old habit, but it's something that's
> good to go.
But what do you use? RAID5 is most efficient for building large arrays -
what is the alternative?
Hi.
On Sat, Oct 05, 2019 at 09:09:21PM +0200, Pascal Hambourg wrote:
> > > > It's safe only if your SSD firmware is sane and does not corrupt your
> > > > data while processing TRIM with NCQ enabled.
> > > > For instance, some noname Chinese SSD (ADATA, for instance) can corrupt
> > > >
Le 05/10/2019 à 18:27, Reco a écrit :
mdraid and dm-raid have discard disabled by default
with RAID4/5/6 for safety reasons. One must pass the parameter
devices_handle_discard_safely=Y to the module raid456 or dm-raid
respectively to enable it.
I want to make it clear that using this option
On Sat, Oct 05, 2019 at 06:14:24PM +0200, Pascal Hambourg wrote:
> > > Is fstrim useful in suc a case ?
> >
> > It's disabled by default, but you can enable by setting
> > "issue_discards=1" in lvm.conf, and by adding "discard" option to your
> > crypttab. There's no SSD-specific mdraid
Le 05/10/2019 à 15:55, Reco a écrit :
On Sat, Oct 05, 2019 at 02:52:55PM +0200, Erwan David wrote:
I've got a computer with 3 SSD in RAID5 (dm-raid) containing a LUKS
partition, then a lvm
dm-raid (device-mapper) or mdraid (mdadm) ?
Is fstrim useful in suc a case ?
It's disabled by
Le 05/10/2019 à 15:55, Reco a écrit :
> Hi.
>
> On Sat, Oct 05, 2019 at 02:52:55PM +0200, Erwan David wrote:
>> I've got a computer with 3 SSD in RAID5 (dm-raid) containing a LUKS
>> partition, then a lvm
>> Is fstrim useful in suc a case ?
> It's disabled by default, but you can enable by
Hi.
On Sat, Oct 05, 2019 at 02:52:55PM +0200, Erwan David wrote:
> I've got a computer with 3 SSD in RAID5 (dm-raid) containing a LUKS
> partition, then a lvm
> Is fstrim useful in suc a case ?
It's disabled by default, but you can enable by setting
"issue_discards=1" in lvm.conf, and
Hi,
I've got a computer with 3 SSD in RAID5 (dm-raid) containing a LUKS
partition, then a lvm
Is fstrim useful in suc a case ? Or on mylaptop without the raid, but
with LUKS and LVM ?
Should I add the discard option in fstab ? Or an equivalent in
mdadm.conf or cryptsetup.conf ?
Thanks
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