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Young update
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heatherkellyucl committed Jun 29, 2023
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Expand Up @@ -185,6 +185,30 @@ This page outlines that status of each of the machines managed by the Research C
We're sorry for this situation and are working to address it. We'll keep you updated as we
know more.

- 2023-06-29 11:30 - We've recovered what was on the failing disk and are missing approximately
250kB of metadata. (Since it is metadata, this doesn't directly translate to the effect on your
files, but we can probably be cautiously optimistic about the expected size of impact, should
nothing else go horribly wrong).

Replacement disks are being sent to us and should arrive today or tomorrow.

Once the disks arrive, we will proceed with the next step of moving the recovered data onto a
new disk and getting the filesystem to use that in replacement of the failed disk, and then we
can attempt to bring the filesystem up and see what status it thinks it is in. At that point we
will have several levels of filesystem health checking to run.

We are also progressing with some contingency plans relating to the backup data we have, to
make it easier to use should we need to.

I've had a couple of questions about when Young will be back up - we don't know yet, but not
during next week. I would expect us to still be doing the filesystem recovery and checks on
the first couple of days of the week even if the disks do arrive today, so we probably won't
have any additional updates for you until midweek.

It does take a long and unpredictable time to rebuild disks, check all the data, and recover
files: as an example, our metadata recovery was giving us estimates of 19 hours to 5 days while
it was dealing with the most damaged portions of the disk.


### Michael

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