Graceful way to spin down (unload head) USB attached mobile hard drive BEFORE shutdown(poweroff/reboot/halt)

wlmqljj · 23 2023 08:49

That’s right. It’s an old issue.
I’m not familar with linux kernel dev,
Maybe manually turn off the usb disk is right solution and it’s the creed for geek linux user.
But it will be really disappointing when I found my usb HDD broken because of this.

Related Doc:

github.com

torvalds/linux/blob/v5.11/include/scsi/scsi_device.h#L186


      
          	unsigned no_report_opcodes:1;	/* no REPORT SUPPORTED OPERATION CODES */
          	unsigned no_write_same:1;	/* no WRITE SAME command */
          	unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */
          	unsigned skip_ms_page_8:1;	/* do not use MODE SENSE page 0x08 */
          	unsigned skip_ms_page_3f:1;	/* do not use MODE SENSE page 0x3f */
          	unsigned skip_vpd_pages:1;	/* do not read VPD pages */
          	unsigned try_vpd_pages:1;	/* attempt to read VPD pages */
          	unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
          	unsigned no_start_on_add:1;	/* do not issue start on add */
          	unsigned allow_restart:1; /* issue START_UNIT in error handler */
          	unsigned manage_start_stop:1;	/* Let HLD (sd) manage start/stop */
          	unsigned start_stop_pwr_cond:1;	/* Set power cond. in START_STOP_UNIT */
          	unsigned no_uld_attach:1; /* disable connecting to upper level drivers */
          	unsigned select_no_atn:1;
          	unsigned fix_capacity:1;	/* READ_CAPACITY is too high by 1 */
          	unsigned guess_capacity:1;	/* READ_CAPACITY might be too high by 1 */
          	unsigned retry_hwerror:1;	/* Retry HARDWARE_ERROR */
          	unsigned last_sector_bug:1;	/* do not use multisector accesses on
          					   SD_LAST_BUGGY_SECTORS */
          	unsigned no_read_disc_info:1;	/* Avoid READ_DISC_INFO cmds */
          	unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */

http://www.linux-ata.org/shutdown.html

https://bugzilla.kernel.org/show_bug.cgi?id=205107

Solutions:

add a udev rule

/etc/udev/rules.d/01-manage_start_stop.rules

ACTION=="add|change", DRIVERS=="usb-storage|uas", SUBSYSTEM=="scsi_disk", ATTR{manage_start_stop}="1"

do it Manually (do it as super user)

find /sys -name manage_start_stop
echo 1 > /sys/class/scsi_disk/h:c:i:l/manage_start_stop
("h:c:i:l" replace to what you saw above)