Re: How often to run self-tests?
Christian Franke <[email protected]>
| Newsgroups | gmane.linux.utilities.smartmontools |
|---|---|
| Message-ID | <[email protected]> |
Ivan Lezhnjov Jr. wrote: > On Dec 15, 2013, at 4:58 AM, Weedy <...> wrote: > >> A very long time ago I found this and use it everywhere now. I don't even remember what the options mean anymore. >> /dev/sda -d ata -o off -S on -a -s (O/../../(7|3)/00|S/../.././12|L/../../6/03|C/../../7/03) -m root > I read all man pages, was a bit painful haha but I can read that line like English now :P You are welcome to provide (well tested and reviewed) patches(!) for the man page files. > Stiil, wondering if there's any theory behind how fast these types of checks should be run. One thing is obvious, SMART is meant to expose a problem before it becomes a real problem of sorts. So, perhaps running the tests somewhat often is a good idea. But how often that IS the question. It depends and may require some experiments. For servers running 7x24, one short test per day and one long test per week is a good starting point. For desktop systems running 5x8, long tests may not work at all because: - OS accesses may slow down the self-test such that it cannot be completed during working hours, and/or - the self-test may slow down the OS accesses such that the system is unusable. This depends on the vendor specific self-test implementation in drive firmware. >> I have a follow up question for this. I can drop the /dev/sdX and use DEVICESCAN right? > Absolutely Note that DEVICESCAN does not work for drives behind most RAID controllers. Possible implementations would be vendor and platform specific. >> How would I tell smartd to stagger the tests if I have a 4+ drive raid? Automatic staggering of tests is not possible yet. You need to add an individual smartd.conf entry for each drive. I agree that this feature would make sense. Please create a ticket: https://sourceforge.net/apps/trac/smartmontools/newticket Thanks, Christian ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk