These commands may not work on all HDs: some manufacturers have changed their desktop drives to stop support for the ERC parameter,<ref>[{{cite web|url=http://www.spinics.net/lists/raid/msg38964.html|title=Re: Messagemd onRAID thewith Linuxenterprise-class MDSATA mailingor list]SAS drives|work=spinics.net}}</ref> purportedly to force sales of their more expensive RAID/enterprise models.
==RAID controllers==
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==Software RAID==
Linux [[mdadm]] simply holds and lets the drive complete its recovery - however, the default command timeout for the SCSI Disk layer (/sys/block/sd?/device/timeout) is 30 seconds,<ref>[{{cite web|url=https://github.com/torvalds/linux/blob/master/drivers/scsi/sd.h#LC11 drivers/scsi|title=linux/sd.h fromat themaster Linux· 2.6torvalds/linux tree]· GitHub|work=GitHub}}</ref> after which it will attempt to reset the drive, and if that fails, offline the drive<ref>[{{cite web|url=https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/scsi/scsi_eh.txt|title=kernel/git/torvalds/linux.git SCSI- errorLinux handlerkernel documentation]source tree|work=kernel.org}}</ref>
