On Thu, 2008-03-20 at 22:08 +0100, Raoul Bhatia [IPAX] wrote: > hi james, > > James Bottomley wrote: > > A work around might be to lower the queue depth to say 4 or 8 and up the > > retries (this latter can only be done by altering the SD_MAX_RETRIES > > parameter in include/scsi/sd.h and recompiling). > > any suggestions for these parameters: > > include/scsi/sd.h: > > #define SD_TIMEOUT (30 * HZ) > > #define SD_MOD_TIMEOUT (75 * HZ) > > > > #define SD_MAX_RETRIES 5 > > #define SD_PASSTHROUGH_RETRIES 1 > > shall i alter the timeouts? The timeouts can be altered on the fly at /sys/class/scsi_device/<device>/device/timeout but I'd leave them as is for now ... it wasn't the timeouts that fired. > what is a good value for the retries? time it by 2? by 5? by 10? I'd up the retries to say 15 and see if that works. > moreover, where can i lower the queue? echo <new depth> > /sys/class/scsi_device/<device>/device/queue_depth James -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
