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How to properly poweroff external HDD in HDD rack

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2 answers
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I got Pi4 4Gb running rasbian (similar to Debian) and Orico 4bay HDD rack connected with USB3. Earlier with same host and one HDD in separate enclosure I was able to power off disk using: sudo udisksctl power-off -b /dev/sda But now, for this four disks enclosure rack I got errors like this: pi@raspberrypi:~ $ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 931.5G 0 disk └─sda1 8:1 0 931.5G 0 part └─md0 9:0 0 931.4G 0 raid1 /mnt/raid sdb 8:16 0 931.5G 0 disk └─sdb1 8:17 0 931.5G 0 part └─md0 9:0 0 931.4G 0 raid1 /mnt/raid sdc 8:32 0 2.7T 0 disk └─sdc1 8:33 0 2.7T 0 part /mnt/wdred sdd 8:48 0 1.8T 0 disk └─sdd1 8:49 0 1.8T 0 part mmcblk0 179:0 0 14.8G 0 disk ├─mmcblk0p1 179:1 0 256M 0 part /boot └─mmcblk0p2 179:2 0 14.6G 0 part / pi@raspberrypi:~ $ sudo umount /mnt/raid pi@raspberrypi:~ $ sudo umount /mnt/wdred pi@raspberrypi:~ $ sudo udisksctl power-off -b /dev/sdc Error powering off drive: Error opening /dev/sdb for fsync: Device or resource busy (udisks-error-quark, 0) pi@raspberrypi:~ $ sudo udisksctl power-off -b /dev/sda Error powering off drive: Error opening /dev/sdb for fsync: Device or resource busy (udisks-error-quark, 0) pi@raspberrypi:~ $ sudo udisksctl power-off -b /dev/sdb Error powering off drive: Error opening /dev/sdb for fsync: Device or resource busy (udisks-error-quark, 0) pi@raspberrypi:~ $ sudo udisksctl power-off -b /dev/sdd Error powering off drive: Error opening /dev/sdb for fsync: Device or resource busy (udisks-error-quark, 0) pi@raspberrypi:~ $ If I shutdown pi and the turn off this rack with power button on it I see increment of Power-Off_Retract_Count attribute in HDD Smart (so this is not graceful power off, but emergency retract). How can I properly power off drives in this rack?
Asked by garik f (21 rep)
Apr 1, 2023, 07:20 AM
Last activity: Apr 18, 2025, 12:51 PM