9.1 AMD64 multitasking efficiency low

[CeDeROM]

On Tue, Feb 12, 2013 at 2:04 PM, Christian Gusenbauer <c47g at gmx.at> wrote:
> Maybe it's hardware related? I experience the same slowness as you do as soon
> as I copy more than a few MB of data *on the same drive*. (...)

Hello Christian :-) Thank you for your feedback! :-) There was no
problem today to copy from internal ufs2 to external ufs2, but I have
tried to copy back from external (ufs2) to internal (ufs2) and guess
what - I got the terrible slowdown!!! Just when I hit Ctrl+C things
get back to normal right away.. so the problem is with writing to the
WDC SATA drive...

Is it something wrong with the mass storage / ahci / sata driver?
Yesterday I have switched the SATA from RAID to AHCI mode, but this
seems to change nothing. Is it something wrong with the WDC drives?
:-\

Internal drive:
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <WDC WD5000BEVT-00A03T0 01.01A01> ATA-8 SATA 2.x device
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad4

External drive:
da0 at umass-sim0 bus 0 scbus5 target 0 lun 0
da0: <FUJITSU MJA2320BH G2 > Fixed Direct Access SCSI-2 device
da0: 40.000MB/s transfers
da0: 305245MB (625142448 512 byte sectors: 255H 63S/T 38913C)

Thank you!! :-)
Tomek


-- 
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info