получить / установить параметры устройства SATA / IDE (get/set SATA/IDE device parameters)
Ошибки (баги) (Bugs)
As noted above, the -m sectcount and -u 1 options should be used
with caution at first, preferably on a read-only filesystem.
Most drives work well with these features, but a few
drive/controller combinations are not 100% compatible.
Filesystem corruption may result. Backup everything before
experimenting!
Some options (e.g. -r for SCSI) may not work with old kernels as
necessary ioctl()´s were not supported.
Although this utility is intended primarily for use with SATA/IDE
hard disk devices, several of the options are also valid (and
permitted) for use with SCSI hard disk devices and MFM/RLL hard
disks with XT interfaces.
The Linux kernel up until 2.6.12 (and probably later) doesn´t
handle the security unlock and disable commands gracefully and
will segfault and in some cases even panic. The security commands
however might indeed have been executed by the drive. This poor
kernel behaviour makes the PIO data security commands rather
useless at the moment.
Note that the "security erase" and "security disable" commands
have been implemented as two consecutive PIO data commands and
will not succeed on a locked drive because the second command
will not be issued after the segfault. See the code for hints
how patch it to work around this problem. Despite the segfault it
is often still possible to run two instances of hdparm
consecutively and issue the two necessary commands that way.
