Re: SATA HD & DMA ?

From: Michael Heiming (michael+USENET_at_www.heiming.de)
Date: 08/31/04 

Date: Tue, 31 Aug 2004 06:36:25 -0000

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In comp.os.linux.hardware Hish <haleil@comcastnotspam.net> suggested:
> Hello,
> Just curious...Do Serial ATA 150 drives benefit from enabling dma
> via hdparm the way regular ATA drives do?
> Any special optins I should use?

Mh, doesn't work for me at all:

# hdparm -d /dev/sda

/dev/sda:
 operation not supported on SCSI disks

# 3ware-check.sh
# of ports: 2
    Port 0: ST380013AS 3JV9BNGZ 74.53 GB (156301488 blocks): OK(unit 0)
    Port 1: ST380013AS 3JV9846B 74.53 GB (156301488 blocks): OK(unit 0)

Output from: tw_cli info c0 drivestatus

SATA drives on 3ware hw RAID controller running in RAID 1 mode.
Might depend on how your system uses SATA, mine recognizes them
as SCSI and those hdparm settings don't work with SCSI. 

-- 
Michael Heiming (GPG-Key ID: 0xEDD27B94)
mail: echo zvpunry@urvzvat.qr | perl -pe 'y/a-z/n-za-m/'
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