Very slow writing to SATA disk
mi at aldan.algebra.com
Thu Oct 27 22:18:05 PDT 2005
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!
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