>>>>> "Oliver" == Oliver Neukum <oneukum@xxxxxxxx> writes:
Oliver> Some SATA to USB bridges fail to cooperate with some drives
Oliver> resulting in no cache being present being reported to the
Oliver> host. That causes the host to skip sending a command to
Oliver> synchronize caches. That causes data loss when the drive is
Oliver> powered down.
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index a6c346d..392d166 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -179,6 +179,7 @@ struct scsi_device {
unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */
unsigned is_visible:1; /* is the device visible in sysfs */
unsigned wce_default_on:1; /* Cache is ON by default */
+ unsigned always_sync:1; /* synchronize cache in every case*/
unsigned no_dif:1; /* T10 PI (DIF) should be disabled */
unsigned broken_fua:1; /* Don't set FUA bit */
unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */
I must be missing something. How is always_sync different from just
setting wce_default_on?
--
Martin K. Petersen Oracle Linux Engineering
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