Re: SATA SSD seems to need 'spin up' time after being idle
Chris Green wrote:
> I have a Fujitsu q957 system running Debian 13 that has two 2TB disk
> drives, the main one is an NVME disk and the other is a SATA SSD (a
> Crucial BX500 to be specific).
>
> The SATA SSD seems to go to sleep after being idle for a while and
> takes several seconds to wake up when it's accessed. Once woken up it
> works fine with the expected speed etc.
>
> Can anyone suggest why this start-up delay is happening and, more to
> the point, how to stop it?
>
> The fstab entry for the disk is:-
>
> UUID=7dde06f8-5179-4ec9-9def-59f68678e40c /xub ext4
>
> ... and fdisk reports:-
>
> Disk /dev/sda: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
> Disk model: CT2000BX500SSD1
> Units: sectors of 1 * 512 = 512 bytes
This is almost certainly SATA power-saving mode.
sudo apt install powertop
sudo powertop
Let it run the analysis, then tab over to power settings and
turn off anything to do with SATA power management.
-dsr-
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