When I issued
sudo hdparm -I /dev/hdb I got, among other info,
a list of commands/features, most of which are enabled,
except for a few. To wit:
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set <<<<<<<
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* DOWNLOAD_MICROCODE
SET_MAX security extension <<<<<<<<<<<<
* Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* 64-bit World wide name
Write-Read-Verify feature set <<<<<<<<<<
* WRITE_UNCORRECTABLE_EXT command
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Native Command Queueing (NCQ)
* Phy event counters
Device-initiated interface power management <<<<<<<<
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT Long Sector Access (AC1)
* SCT LBA Segment Access (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
unknown 206[12] (vendor specific)
So, my questions are:
a. how can I use hdparm to enable write/read verify? That's what I am
interested in.
Man page does not mention this.
b. What is the effect of enabling "SET_MAX security extension", i.e.:
hdparm --security-mode m /dev/hdb
What does it buy me?
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