Linux-kernel mailing list archive 2000-01,: Re: howto spin down a SCSI HD?

# Re: howto spin down a SCSI HD?

Richard B. Johnson (root@chaos.analogic.com)
Wed, 5 Jan 2000 10:28:43 -0500 (EST)

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On Wed, 5 Jan 2000 assie@pop.casema.net wrote:

> I'm getting crazy by the sound of my 3 1Gb SCSI hd's
> how can i spin them down so they make less noise?
> I heard about scsi-idle but there are only old versions 2.0.36 ,2.1.62
> Is it already included in the newer kernels? (i'm running 2.3.35)
>
> I wish you all a noiseless new year
>

The START/STOP unit command (0x1b) will, with some devices, shut down
the drive motor. However, this command is optional and not implemented
on all drives.

Further, the first READ/WRITE, etc., access does not automatically
restart the drive. You have to specifically restart it. An attempt
to READ/WRITE from a stopped drive will return a not-ready error.
It takes quite a bit of time to get a drive back up and running after
it has been shut down.

If your drives are noisy, check their mounting. The CPU fan on my
system is louder than the SCSI drives.

Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: SEAGATE Model: ST32171W Rev: 0484
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: Quantum Model: XP32150W Rev: L912
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 03 Lun: 00
Vendor: EXABYTE Model: EXB-82058VQANXR1 Rev: 07T0
Type: Sequential-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: TOSHIBA Model: CD-ROM XM-3601TA Rev: 1885
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 14 Lun: 00
Vendor: SEAGATE Model: ST34573W Rev: 5698
Type: Direct-Access ANSI SCSI revision: 02

Cheers,
Dick Johnson

Penguin : Linux version 2.3.35 on an i686 machine (400.59 BogoMips).

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- Next message: Terry Katz: "RE: Gunzip Problems with linux-2.2.14.tar.gz?"
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- In reply to: assie@pop.casema.net: "howto spin down a SCSI HD?"
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