Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I have a home-fileserver with 6 desktop harddisks in a md-raid.

The server isn't accessed a lot, so I think it would be good for the harddrives to go in standby-mode after some idle time (e.g. with the hdparm -S or hd-idle command).

Is this safe when using mdadm or could this cause errors/degraded harddisks?

share|improve this question
As a quick answer, I believe that if something is supposed to write/read the drive, it will come out of standby. –  soandos Aug 26 '11 at 21:35
I take it you're not using a desktop environment on this computer? It'd be really safe if gnome or kde did it for you. –  digitxp Aug 26 '11 at 21:36
@soandos: Yes that's the behaviour I would expect too. –  Dani31 Aug 26 '11 at 21:43
@digitxp: You're right, but why do you think it would be really safe with a desktop environment? –  Dani31 Aug 26 '11 at 21:44
@Dani31 You know the Gnome guys, they'll make something absolutely idiotproof or if they can't they'll pretend such a feature never existed. –  digitxp Aug 26 '11 at 21:47
add comment

1 Answer

up vote 3 down vote accepted

I should think so. I have been using it my backup machine with RAID-1 for about a year. Got the tips from this page. It is also mentioned on the Gentoo wiki and [H]ardforum threads.

Also, the man page for hdparm marks the similar power off mode (-s ) as VERY DANGEROUS but makes no mention about risks in the hd-idle section.

share|improve this answer
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.