On 04/28/2017 08:07 AM, Peter Grandi wrote:
[ ... ] I do run tler.sh that sets 180s timeout for drives
that do not have scterc from /etc/rc.local. Am I putting my
data in serious danger?
No.
I only have videos and tv recordings in this md
The problem with SCT/ERC absence is that the 2-3 minutes of
retries suspend IO for that long, and for people running
interactive applications (usually LAMP-style web applications)
that is a bad idea, but in your case you seem to have just a
personal archive of entertainment files.
For interactive "enterprise" applications the common practice is
to reduce the error timeout to 1-2 seconds, so the failing drive
drops out of the MD set quickly and can be replaced, minimizing
delays.
Interestingly, the drives did not pass SMART test and mkfs.ext4 -c -c
checks. So, I returned them. I plan to buy WD gold (the other extreme in
price point :-)
which can be replaced with significant effort (about 12TB of
movies and tv shows will take some time to copy from my
DVDs/BDs)
Backups are very important, and RAID is not an alternative to
backups. You can buy and use SMR disk drives as if they were
tapes (or with a filesystem like NILFS2) to do that backup, and
they are quite cheap.
I am using my actual DVDs as backup. For TV shows they are available in
Netflix, if I really want to watch them again.
However, your point is well taken. I will think about backup as my
collection has grown over the years and it will be really a pain to go
back to DVDs to populate my media server.
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