last write to drive issued with write cache off?
I was looking through the official spec on the IBM 120gxp drives (looking for more info on the 333hr/mo thing) when the following sentence jumped out at me.
"To prevent loss of customer data, it is recommended that the last write access before power off be issued after setting the write cache off."
I was curious if we're actually doing this when someone issues a shutdown command. Anyone know?
Just wondering,
Chris
Signature · 4 lines
Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: [email protected]
Quoted 2 lines
"To prevent loss of customer data, it is recommended that the last write access before power off be issued after setting the write cache off."
Standard 2.4 doesn't do this. 2.4.19-ac issues cache flushes.
Quoted 4 lines · Alan Cox
Quoted 2 lines
"To prevent loss of customer data, it is recommended that the last write access before power off be issued after setting the write cache off."
Standard 2.4 doesn't do this. 2.4.19-ac issues cache flushes.
Is this what's been causing my harddrives to make funny noises on shutdown recently?
Bernd
Quoted 9 lines · Bernd Schmidt
Quoted 4 lines · Alan Cox
Quoted 2 lines
"To prevent loss of customer data, it is recommended that the last write access before power off be issued after setting the write cache off."
Standard 2.4 doesn't do this. 2.4.19-ac issues cache flushes.
Is this what's been causing my harddrives to make funny noises on shutdown recently?
Your so called funny noise is the process of flushing cache and putting your drive to sleep in a spin down. It only happens if you are going to shutdown thw system. If you are warm booting or rebooting you only get a flush cache.
Cheers,
Andre Hedrick
LAD Storage Consulting Group