ZFS & power-failure: sta­ble

At the week­end there was a power-fail­ure at our disaster-recovery-site. As every­thing should be con­nect­ed to the UPS, this should not have had an impact… unfor­tu­nate­ly the guys respon­si­ble for the cabling seem to have not pro­vid­ed enough pow­er con­nec­tions from the UPS. Result: one of our stor­age sys­tems (all vol­umes in sev­er­al RAID5 vir­tu­al disks) for the test sys­tems lost pow­er, 10 hard­disks switched into failed state when the pow­er was sta­ble again (I was told there where sev­er­al small power-failures that day). After telling the soft­ware to have a look at the dri­ves again, all phys­i­cal disks where accept­ed.

All vol­umes on one of the vir­tu­al disks where dam­aged (actu­al­ly, one of the vir­tu­al disks was dam­aged) beyond repair and we had to recov­er from back­up.

All ZFS based mount­points on the good vir­tu­al disks did not show bad behav­ior (zfs clear + zfs scrub for those which showed check­sum errors to make us feel bet­ter). For the UFS based ones… some caused a pan­ic after reboot and we had to run fsck on them before try­ing a sec­ond boot.

We spend a lot more time to get UFS back online, than get­ting ZFS back online. After this expe­ri­ence it looks like our future Solaris 10u8 installs will be with root on ZFS (our work­sta­tions are already like this, but our servers are still at Solaris 10u6).

Send to Kin­dle

Try­ing to get some more soundsys­tem relat­ed progress

I start­ed a wiki page about improv­ing the soundsys­tem. The idea is sim­i­lar to the wiki page about improv­ing our lin­ux­o­la­tor. It’s a way to tell the peo­ple what is cur­rent­ly avail­able as patch­es (and where), what is bro­ken and needs to be fixed, which improve­ments we like to see and so on. It’s maybe also a good place to list docs for sound­chips. Cur­rent­ly the page about the soundsys­tem is a lit­tle bit low on con­tent. I hope a lot of peo­ple con­tribute with ideas, facts, sug­ges­tions, point­ers to help­ful stuff, (point­ers to) bugs, point­ing out lack of docs and so on (either by mod­i­fy­ing the page, or by mail­ing stuff to multimedia@FreeBSD.org).

With the lin­ux page I was able to gain some momen­tum and sev­er­al peo­ple are already help­ing with patch­es, run­ning tests and so on (even lit­tle help mat­ters). I hope the sound page will show a sim­i­lar ben­e­fit.

So dear read­er, do you play some music some­times? Do you play an instru­ment which can be con­nect­ed to some oth­er stuff (MIDI)? Do you use acrore­ad, skype, or some oth­er lin­ux soft­ware? If yes go to the wiki pages and read them please. When you’re fin­ished please donate 5 – 10 min­utes (I don’t mind if you sep­nd more) of your time and try to tell us at multimedia@FreeBSD.org or emulation@FreeBSD.org about stuff you think could be lis­tet there (instead of smok­ing a cig­a­rette, argue­ing about bad behav­ior of peo­ple around you, or sim­i­lar neg­a­tive stuff). Thanks in advance and trust me, you will earn good kar­ma when you do this!

Send to Kin­dle