To temporarily delete a HDD in Linux, echo 1 to the device/delete file for that drive's block device. To permanently delete before suspend, create a script in /etc/pm/sleep.d/ that echoes 1 to device/delete when suspending. To add the drive back, echo a scan command to each scsi host and restart the system.

1. pg. 1 by chanakan@cclk.lk
ASK BY LINUX KERNEL ADD OR DELETE A HDD
TO DELETE:
The HDD need to be deactivated Temporally,
echo 1 > /sys/block/sdc/device/delete
echo 1 > /sys/block/sde/device/delete
To verify,
pvs -a -o +dev_size
Or the HDD need to be deactivated Permanently,
before suspend.
To make it permanent, add the following file in /etc/pm/sleep.d/ ,
-rwxr-xr-x 1 root root 204 Dec 6 16:03 99_delete_sdc
-rwxr-xr-x 1 root root 204 Dec 6 16:03 99_delete_sde
With Content:
#!/bin/sh
# Delete the failing disk so that it will not block suspend
case "$1" in
suspend|hibernate)
if [ -d /sys/block/sdc ]; then
echo 1 > /sys/block/sdc/device/delete
fi
if [ -d /sys/block/sde ]; then
echo 1 > /sys/block/sde/device/delete
fi
;;
esac
TO ADD IT BACK:
Issue the following to add it back,
echo "- - -" > /sys/class/scsi_host/host0/scan
echo "- - -" > /sys/class/scsi_host/host1/scan
echo "- - -" > /sys/class/scsi_host/host2/scan
init 6
cd /sys/block ; ls && pvs -a -o +dev_size