when one head out of ten fails: disks can keep working with the
nine remaining heads...
some info on this at last in the SATA-IO 3.2 Spec... "Rebuild
Assist...
Some info on the command set (SAS & SATA implementations):
http://www.seagate.com/files/staticfiles/docs/pdf/whitepaper/tp620-1-1110us
On 2013-11-06 09:33, Sage Weil wrote:
On Wed, 6 Nov 2013, Loic Dachary wrote:
Hi Ceph,
People from Western Digital suggested ways to better take advantage
of
the disk error reporting... when one head out of ten fails :
disks can keep working with the nine remaining heads. Losing 1/10 of
the
> Zackc, Loicd, and I have been the main participants in a weekly Teuthology
> call the past few weeks. We've talked mostly about methods to extend
> Teuthology to capture performance metrics. Would you be willing to join us
> during the Teuthology and Ceph-Brag sessions at the Firefly Developer
>
Thanks,
Mike Dawson
Co-Founder & Director of Cloud Architecture
Cloudapt LLC
6330 East 75th Street, Suite 170
Indianapolis, IN 46250
On 11/7/2013 2:12 PM, Kyle Bader wrote:
Once I know a drive has had a head failure, do I trust that the rest of the
drive isn't going to go at an inconvenient
>> Once I know a drive has had a head failure, do I trust that the rest of the
>> drive isn't going to go at an inconvenient moment vs just fixing it right
>> now when it's not 3AM on Christmas morning? (true story) As good as Ceph
>> is, do I trust that Ceph is smart enough to prevent spreadin
> Putting my sysadmin hat on:
>
> Once I know a drive has had a head failure, do I trust that the rest of the
> drive isn't going to go at an inconvenient moment vs just fixing it right now
> when it's not 3AM on Christmas morning? (true story) As good as Ceph is, do
> I trust that Ceph is s
An anonymous kernel developer sends this link:
http://en.wikipedia.org/wiki/Error_recovery_control
On 06/11/2013 08:32, Loic Dachary wrote:
> Hi Ceph,
>
> People from Western Digital suggested ways to better take advantage of the
> disk error reporting. They gave two examples that struck my im
On 11/06/2013 03:33 AM, Sage Weil wrote:
On Wed, 6 Nov 2013, Loic Dachary wrote:
Hi Ceph,
People from Western Digital suggested ways to better take advantage of
the disk error reporting. They gave two examples that struck my
imagination. First there are errors that look like the disk is dying (
On 2013-11-06 09:33, Sage Weil wrote:
This make me think we really need to build or integrate with some
generic
SMART reporting infrastructure so that we can identify disks that are
failing or going to fail.
It could be of use especially for SSD devices used for journals.
Unfortunately ther
On Wed, 6 Nov 2013, Loic Dachary wrote:
> Hi Ceph,
>
> People from Western Digital suggested ways to better take advantage of
> the disk error reporting. They gave two examples that struck my
> imagination. First there are errors that look like the disk is dying (
> read / write failures ) but
It is cool - and it's interesting that more and more access to the
inner workings of the drives would be useful, given ATA controller
history (an evolution of the WD1010 MFM controller) having hidden
steadily more, to maintain compatibility with the old CHS addressing
(later LBA).
The streami
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