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-
