hdparm -s

20/07/2009 - 19:19 von Hans-Joachim Zierke | Report spam
In der Manpage von hdparm lese ich:

#v+
-s Enable/disable the power-on in standby feature, if supported by
the drive. VERY DANGEROUS. Do not use unless you are abso‐
lutely certain that both the system BIOS (or firmware) and the
operating system kernel (Linux >= 2.6.22) support probing for
drives that use this feature. When enabled, the drive is pow‐
ered-up in the standby mode to allow the controller to sequence
the spin-up of devices, reducing the instantaneous current draw
burden when many drives share a power supply. Primarily for use
in large RAID setups. This feature is usually disabled and the
drive is powered-up in the active mode (see -C above). Note
that a drive may also allow enabling this feature by a jumper.
Some SATA drives support the control of this feature by pin 11
of the SATA power connector. In these cases, this command may be
unsupported or may have no effect.
#v-

Linux >= 2.6.22 ist gegeben.

Sofern ich es nicht auf die Bootplatte anwende, was kann passieren, falls das
BIOS keine Unterstützung bietet?


Hans-Joachim


Rail is faster!

http://foto.arcor-online.net/palb/a...366235.jpg
 

Lesen sie die antworten

#1 Marcel Müller
21/07/2009 - 09:19 | Warnen spam
Hallo!

Hans-Joachim Zierke wrote:
In der Manpage von hdparm lese ich:

#v+
-s Enable/disable the power-on in standby feature, if supported by
the drive. VERY DANGEROUS. Do not use unless you are abso‐
lutely certain that both the system BIOS (or firmware) and the
operating system kernel (Linux >= 2.6.22) support probing for
drives that use this feature. When enabled, the drive is pow‐
ered-up in the standby mode to allow the controller to sequence
the spin-up of devices, reducing the instantaneous current draw
burden when many drives share a power supply. Primarily for use
in large RAID setups. This feature is usually disabled and the
drive is powered-up in the active mode (see -C above). Note
that a drive may also allow enabling this feature by a jumper.
Some SATA drives support the control of this feature by pin 11
of the SATA power connector. In these cases, this command may be
unsupported or may have no effect.
#v-

Linux >= 2.6.22 ist gegeben.

Sofern ich es nicht auf die Bootplatte anwende, was kann passieren, falls das
BIOS keine Unterstützung bietet?



Die Abarbeitung der fstab könnte teilweise vor die Wand laufen und damit
alles, was dann auf die nicht verfügbaren Volumes zugreift.
Tendenziell würde ich aber eher damit rechnen, dass das BIOS alle Platte
automatisch hochfàhrt, es sei denn die Ports stehen explizit auf 'None'.
Aber das ist bei ATA natürlich ein nur wenig getestetes Feature.

Aber was ist denn die Motivation für das Feature? Packt es das Netzteil
nicht mehr?


Marcel

Ähnliche fragen