Douglas Phillipson wrote:
hdparm doesn't seem to report, for SCSI drives, the asme stuff it does for IDE drives. I'm specifically looking to see if DMA transfers are on or off. I presume since I don't see a "using_dma" attribute that it doesn't apply to SCSI???
IDE:
/sbin/hdparm -vt /dev/hda
/dev/hda: multcount = 16 (on) IO_support = 1 (32-bit) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 256 (on) geometry = 65535/16/63, sectors = 156301488, start = 0 Timing buffered disk reads: 96 MB in 3.00 seconds = 31.97 MB/sec
SCSI:
/sbin/hdparm -vt /dev/sda
/dev/sda: readonly = 0 (off) geometry = 4420/255/63, sectors = 71020544, start = 0 Timing buffered disk reads: 64 MB in 1.43 seconds = 44.76 MB/sec
Regards
Doug p
From the man pages:
DESCRIPTION
hdparm provides a command line interface to various hard disk ioctls
supported by the stock Linux ATA/IDE device driver subsystem. Some
options may work correctly only with the latest kernels. For best
results, compile hdparm with the include files from the latest kernel
source code.
It is only for ATA/IDE drives.
