blktool [options] device 1N acoustic-mgmt nnn blktool [options] device 1N block-sz nnn blktool [options] device 1 bus-id blktool [options] device 1N bus-state nnn blktool [options] device 1 class blktool [options] device 1N cd-speed nnn blktool [options] device 2 defect-mgmt off on blktool [options] device 2 dev-keep-settings off on blktool [options] device 2 dev-read-ahead off on blktool [options] device 2 dma off on blktool [options] device 1 geometry blktool [options] device 1N i2o-rcache nnn blktool [options] device 1N i2o-wcache nnn blktool [options] device 1 id blktool [options] device 2 keep-settings off on blktool [options] device 2 media unlock lock blktool [options] device 1N multiple-count nnn blktool [options] device 2 no-write-err off on blktool [options] device 2 pio-data 16-bit 32-bit blktool [options] device 1N pio-mode nnn blktool [options] device 1N pm-mode nnn blktool [options] device 1N queue-depth nnn blktool [options] device 1N read-ahead nnn blktool [options] device 2 readonly off on blktool [options] device 1 reread-part blktool [options] device 1 reset blktool [options] device 1 sector-sz blktool [options] device 1 sleep blktool [options] device 1 standby blktool [options] device 2 unmask-irq off on blktool [options] device 1 version blktool [options] 1 version blktool [options] device 2 wcache off on
DESCRIPTION
blktool is used for querying and/or changing settings of a block device.
device is the name of the block device to query or modify.
OPTIONS
-f
For a few commands, blktool will flush the buffers of the block device
out to disk, before performing the requested command. Specify this
option, "force", disables any flushing blktool would attempt to do.
-t class
where class is one of 'ide', 'ata', 'scsi', 'i2o', or 'auto' to override the
default auto-detection of device class.
COMMANDS
acoustic-mgmt
Query or set underlying device's acoustic level.
block-sz
Query or set device block size.
bus-id
Query device bus id.
bus-state
Query or set device bus state (0 off, 1 on, 2 tristate)
class
Query the detected (or overridden, via -t) device class.
Typically this will result in 'ATA' or 'SCSI' for most devices.
Detection is based on device major; thus your SATA device may appear as
'SCSI'.
