Re: [PATCH v2 1/4] scsi: introduce sync_before_stop flag

[PATCH v2 0/4] Support runtime power off of HDD · Aaron Lu <hidden> · 2012-09-18
[PATCH v2 1/4] scsi: introduce sync_before_stop flag · Aaron Lu <hidden> · 2012-09-18
Re: [PATCH v2 1/4] scsi: introduce sync_before_stop flag · Oliver Neukum <hidden> · 2012-09-18
Re: [PATCH v2 1/4] scsi: introduce sync_before_stop flag · Aaron Lu <hidden> · 2012-09-18
Re: [PATCH v2 1/4] scsi: introduce sync_before_stop flag · James Bottomley <James.Bottomley@HansenPartnership.com> · 2012-09-18
Re: [PATCH v2 1/4] scsi: introduce sync_before_stop flag · Aaron Lu <hidden> · 2012-09-18
Re: [PATCH v2 1/4] scsi: introduce sync_before_stop flag · James Bottomley <James.Bottomley@HansenPartnership.com> · 2012-09-18
Re: [PATCH v2 1/4] scsi: introduce sync_before_stop flag · Aaron Lu <hidden> · 2012-09-18
Re: [PATCH v2 1/4] scsi: introduce sync_before_stop flag · Jeff Garzik <hidden> · 2012-09-24
[PATCH v2 2/4] scsi: sd: enter stop power condition on runtime suspend · Aaron Lu <hidden> · 2012-09-18
[PATCH v2 3/4] scsi: sd: set ready_to_power_off for scsi disk · Aaron Lu <hidden> · 2012-09-18
[PATCH v2 4/4] libata: acpi: set can_power_off for both ODD and HDD · Aaron Lu <hidden> · 2012-09-18

From: Oliver Neukum <hidden>
Date: 2012-09-18 07:30:11
Also in: linux-scsi

On Tuesday 18 September 2012 15:00:28 Aaron Lu wrote:

When scsi device received stop command, it will take care of its
internal cache before enters stopped power condition. This command is
translated to standby immediate in libata-scsi, but standby doesn't
imply flush cache for ATA device, so to issue stop command to ATA
device, an additional flush cache has to be issued.

Why not just set WCE?

	Regards
		Oliver

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