|| ||Mark Lord <firstname.lastname@example.org>|
|| ||IDE/ATA development list <email@example.com>,
Linux Kernel <firstname.lastname@example.org>,
Bruce Allen <email@example.com>|
|| ||hdparm-8.1 now available|
|| ||Sat, 16 Feb 2008 10:56:28 -0500|
hdparm has now been updated to version 8.1,
and includes some significant new features of
potential interest to Linux kernel storage hackers:
The new --make-bad-sector flag can be used to deliberately
corrupt a sector on the media (creating a media error situation).
This can be very handy for testing error recovery strategies
and timeouts for devices and RAIDs.
It uses the new ATA WRITE_UNC_EXT command (designed for the purpose)
when the drive supports it, otherwise it will try and fall back on
the older WRITE_LONG command (which is limited to LBA28).
The manpage has more information on this option.
There is also a new --write-sector (aka. --repair-sector) flag
to *fix* a bad sector. This can be used later to undo the bad
sectors created by the --make-bad-sector flag.
The new --read-sector flag can be used to test a sector
for media errors. I generally use the following sequence here:
hdparm --make-bad-sector nnnnnnnn /dev/sdb ## corrup a sector
hdparm --read-sector nnnnnnnn /dev/sdb ## verify that it is now bad
test my device driver etc..
hdparm --repair-sector nnnnnnn /dev/sdb ## fix the bad sector
hdparm --read-sector nnnnnnn /dev/sdb ## verify that it is now fixed
hdparm also now has a new -N flag for dealing with Host-Protected-Areas (HPA),
and other, more minor, fixes and enhancements.
hdparm-8.1 is available at http://sourceforge.net/projects/hdparm/
Thanks to Bruce Allen for supplying me with test drives
which implement the new WRITE_UNC_EXT command.
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