tferero received an email from Bruce Allen. For the whole story read : http://www.linuxquestions.org/questions/showthread.php?p=2945630#post2945630
[quote=Bruce Allen] I think that the -B value of 255 is incorrect. You should use 254 for maximum performance. 255 IS DOCUMENTED AS 'RESERVED' IN THE ATA/SATA SPECS. THE BEHAVIOR OF -B 255 THUS IS NOT PREDICTABLE AND IT MAY HAVE NO EFFECT. Also according to the ATA/SATA specs any value greater than or equal to 128 will 'not permit the device to spin down to save power'. So 128 will reduce power use as much as possible but not permit spin-down. [/quote] Bruce Allen is : * author of "Monitoring Hard Disks with SMART", Linux Journal, 2004) : http://www.linuxjournal.com/article/6983 * maintainer of the website http://smartmontools.sourceforge.net/ blackhole54 notified us here about this here : http://ubuntuforums.org/showpost.php?p=3690862&postcount=15 So maybe Ubuntu should default to override "hdparm -B" settings below 128 with 128. -- Hard drive spindown should be configurable https://bugs.launchpad.net/bugs/17216 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
