[Bug 59695] High frequency of load/unload cycles on some hard disks may shorten lifetime
Accepted acpi-support into hardy-proposed, please test and give feedback here. Please see https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance! -- High frequency of load/unload cycles on some hard disks may shorten lifetime https://bugs.launchpad.net/bugs/59695 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 59695] High frequency of load/unload cycles on some hard disks may shorten lifetime
Akshay Srinivasan wrote: So , the hard disk doesn't exactly go into suspend when the disk head is parked, so the kernel doesn't get to know that the disk head is parked(because standby=parking) - it interprets this as a sign that the hard disk is in Active/Idle mode.So it doesn't bother stopping data from being written to the disk - this will inevitably cause the head to unpark from the ramp.What do you guys think of this ?I think the problem is associated with the way in which the standby command is issued (by the kernel?).My disk never went to standby on laptop-mode , just a bunch of head parkings. But that's not how laptop mode works. Laptop mode simply assumes that the drive has been configured to do the right thing during idle periods, and then it simply holds off I/O as long as possible, and then tries to cram in as much I/O as possible at a time when there is some I/O that cannot be postponed. The kernel never actually checks the drive's power state, just like it doesn't actively spin it dow -- it's using only the assumption if I hold off I/O for longer periods, the drive will somehow use this to save power. Cheers, Bart -- High frequency of load/unload cycles on some hard disks may shorten lifetime https://bugs.launchpad.net/bugs/59695 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 59695] High frequency of load/unload cycles on some hard disks may shorten lifetime
So , the hard disk doesn't exactly go into suspend when the disk head is parked, so the kernel doesn't get to know that the disk head is parked(because standby=parking) - it interprets this as a sign that the hard disk is in Active/Idle mode.So it doesn't bother stopping data from being written to the disk - this will inevitably cause the head to unpark from the ramp.What do you guys think of this ?I think the problem is associated with the way in which the standby command is issued (by the kernel?).My disk never went to standby on laptop-mode , just a bunch of head parkings. .I used hdparm to find the mode of the HD.Hdparm doesn't wake up the disk from standby by state -in contrast to smartctl. -- High frequency of load/unload cycles on some hard disks may shorten lifetime https://bugs.launchpad.net/bugs/59695 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
