> Hi all, > > Today I installed 16 fresh Western Digital WD5000BEVT (2,5") drives in one > of our test servers. > > I created a software raid5 with a hotspare on these 16 disks. > > I noticed that the detection of the disks during boottime was very very > slow. > Creating the md superblocks went very very slow. > > After that all seemed fine (speed of the raid5 init was normal). > > I noticed many of these messages in the syslog (also attached): > > Mar 31 14:34:17 test ata_id[3752]: main: HDIO_GET_IDENTITY failed for > '/dev/.tmp-8-112' > Mar 31 14:34:17 test ata_id[3765]: main: HDIO_GET_IDENTITY failed for > '/dev/.tmp-8-128' > > This seems to correspond to the slow detection of the disks. > > Is this an ATA problem, or a problem in the mvsas driver? > > I use the mvsas driver from 2.6.32 with the latest patch from Srinivas. > > Kind regards, > Caspar Smit > > > [Jack] It's normal behavior of SATA disk, SATA disk need more time than > SAS > disk to spin up to response command. I use loads of other SATA disks which don't have this behavior. Caspar [Jack] In my test, some big SATA disks(ie 500G above)have this issues. Best Regards ************************************************************************ Jack Wang -- 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
