Date: Fri, 28 Oct 2005 01:18:03 -0400 (EDT) From: "Mikhail T." <mi@aldan.algebra.com> To: hardware@FreeBSD.org, hackers@FreeBSD.org Cc: sos@FreeBSD.org Subject: Very slow writing to SATA disk Message-ID: <200510280518.j9S5I3oQ025430@blue.virtual-estates.net>
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Hi! I've got a new Hitachi drive with 16Mb of cache: ad8: 476940MB <HDS725050KLA360 K2AOA11A> at ata4-master SATA150 and am trying to use it to store backups online. Unfortunately, writing to the disk is painfully slow (by today's standards) -- it can barely keep 7Mb/second and my other (SCSI) disks run circles around it. I tried to just cp a huge file from a SCSI disk to this one -- without any other activity. 7Mb/second is the best it could do :-( For bulk writing, undisturbed by other access, I'd expect at least 30Mb/sec... Is it the drive, the controller: atapci1: <SiI 3114 SATA150 controller> port 0xac00-0xac07,0xa480-0xa483,0xa400-0xa407,0xa080-0xa083,0xa000-0xa00f mem 0xbe6fbc00-0xbe6fbfff irq 25 at device 5.0 on pci3 the driver (6.0/amd64), or a misconfiguration of some sort? According to smartctl, the drive runs at 56C during the copying. Its idle temperature seems to be 54C. Thanks for any hints! -mi
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