Date: Tue, 08 Aug 2006 11:27:12 -0400 Subject: Re: [sbp2] external hard disk shutdown timer > > Stefan Richter wrote: > > Douglas Gilbert wrote: > >> olecom@xxxxxxx wrote: > >>> Hallo ! Let me ask a question. > >>> > >>> I couldn't change some values (f.e IDLE or ICT), while its > >>> "changing" flag is "y". > >> I would be surprised if you could change IDLE or > >> ICT on a SCSI disk and even more surprised if > >> that could be done through a bridge to an ATA > >> disk (as is happening in your case). > > It seems that <olecom@xxxxxxx> hopes the the SCSI "idle" > power condition will map to the ATA STANDBY command > (as the ATA IDLE command action looks pretty vague). > I didn't hope on anything, actually, but wanted to find in t10's specs, what i saw in sdparm output. In "SCSI Primary Commands - 2 (SPC-2): 8.3.9 Power condition page" <http://t10.org/ftp/t10/drafts/spc2/spc2r20.pdf> page 204 i've found that matched what i wanted: IDLE and STANDBY timers in 1Ah table. It seemed OK to me with that i saw in sdparm. Anyway thank you, guys, i wish you keep good work done well ! P.S. Finally it was like "wake up, Neo" for me. Why i don't use "standard flow" to do things ? I mean load wiXP, ask WD support ? From WD's FAQ: ,- |- Question | Do Western Digital external hard drives spin down after a certain amount | of inactivity time? How can I disable this feature? |- Answer | The external hard drives listed below will spin down (enter into power saver mode) | after 10 minutes of drive inactivity. Once the drive is accessed again, the drive | will exit from the power saver mode and spin back up. | | Please Note: This is a permanent feature of the external hard drives and cannot | be disabled. `- Finita. So, Douglas, this one isn't for 24x7 at all. But i think 250GB just for backup isn't good, thus 10 minutes is a very short time interval. So, i need something like 'dd count=1 </dev/ext-wd' every 9 minutes in cron :-) -- -o--=O`C #oo'L O <___=E M - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
