[SOLVED] Are SATA hard disk drives SCSI devices?

stf92 · 12-09-2013, 05:46 PM

Hi: well, perhaps some are and some are not. The thing is I need to recompile the kernel, and I read this somewhere:

Quote:

Jim Bradley has this additional advice if you have SCSI devices and support has been compiled as a module.

With a scsi drive (or raid) the initial block device modules needed to access the root filesystem are loaded in memory. When you recompile a kernel, you also recompile the modules associated with that kernel, so you need to remake the initrd images. With a scsi system, it was one of the things that I had to learn first, because my new kernels never worked unless I booted them off floppy.

This is my hard disk drive:

Code:

root@server:~# smartctl -i /dev/sda
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-3.2.29] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda (SATA 3Gb/s, 4K Sectors)
Device Model:     ST500DM002-1BD142
Serial Number:    W2AKBY71
LU WWN Device Id: 5 000c50 05b1dc6c5
Firmware Version: KC45
User Capacity:    500,107,862,016 bytes [500 GB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 4
Local Time is:    Mon Dec  9 20:42:20 2013 ART
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

root@server:~# hdparm -I /dev/sda

/dev/sda:

ATA device, with non-removable media
	Model Number:       ST500DM002-1BD142                       
	Serial Number:      W2AKBY71
	Firmware Revision:  KC45    
	Transport:          Serial, SATA Rev 3.0
Standards:
	Used: unknown (minor revision code 0x0029) 
	Supported: 8 7 6 5 
	Likely used: 8
Configuration:
	Logical		max	current
	cylinders	16383	16383
	heads		16	16
	sectors/track	63	63
	--
	CHS current addressable sectors:   16514064
	LBA    user addressable sectors:  268435455
	LBA48  user addressable sectors:  976773168
	Logical  Sector size:                   512 bytes
	Physical Sector size:                  4096 bytes
	Logical Sector-0 offset:                  0 bytes
	device size with M = 1024*1024:      476940 MBytes
	device size with M = 1000*1000:      500107 MBytes (500 GB)
	cache/buffer size  = 16384 KBytes
	Nominal Media Rotation Rate: 7200
Capabilities:
	LBA, IORDY(can be disabled)
	Queue depth: 32
	Standby timer values: spec'd by Standard, no device specific minimum
	R/W multiple sector transfer: Max = 16	Current = 16
	Recommended acoustic management value: 208, current value: 0
	DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
	     Cycle time: min=120ns recommended=120ns
	PIO: pio0 pio1 pio2 pio3 pio4 
	     Cycle time: no flow control=120ns  IORDY flow control=120ns
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)
	   *	Gen3 signaling speed (6.0Gb/s)
	   *	Native Command Queueing (NCQ)
	   *	Phy event counters
	   *	unknown 76[15]
	    	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)
	    	unknown 206[13] (vendor specific)
Security: 
	Master password revision code = 65534
		supported
	not	enabled
	not	locked
		frozen
	not	expired: security count
		supported: enhanced erase
	78min for SECURITY ERASE UNIT. 78min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5000c5005b1dc6c5
	NAA		: 5
	IEEE OUI	: 000c50
	Unique ID	: 05b1dc6c5
Checksum: correct
root@server:~#

Would somebody tell me if it is an SCSI device?

astrogeek · 12-09-2013, 05:50 PM

No, that is not a SCSI drive.

It is 6GB/s Serial ATA (SATA).

stf92 · 12-09-2013, 05:56 PM

Oh thank you very much, astrogeek.

astrogeek · 12-09-2013, 06:00 PM

You are welcome!

It is worth noting that it might still appear in SCSI device lists, like lsscsi.

But a SCSI device in the context of your question is something else entirely.

They would generally be listed as SAS (Serial Attached SCSI) instead of SATA.

Hope that helps.

Richard Cranium · 12-09-2013, 06:16 PM

Quote:

Originally Posted by astrogeek

They would generally be listed as SAS (Serial Attached SCSI) instead of SATA.

Unless they aren't...

Code:

root@noyfb:~# smartctl -i /dev/sde
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-3.10.17] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor:               SEAGATE 
Product:              ST3146707LC     
Revision:             D704
User Capacity:        146,815,733,760 bytes [146 GB]
Logical block size:   512 bytes
Serial number:        3KS52NTR
Device type:          disk
Transport protocol:   Parallel SCSI (SPI-4)
Local Time is:        Mon Dec  9 18:14:27 2013 CST
Device supports SMART and is Enabled
Temperature Warning Enabled

astrogeek · 12-09-2013, 06:34 PM

Quote:

Originally Posted by Richard Cranium

Unless they aren't...

Code:

root@noyfb:~# smartctl -i /dev/sde
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-3.10.17] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor:               SEAGATE 
Product:              ST3146707LC     
Revision:             D704
User Capacity:        146,815,733,760 bytes [146 GB]
Logical block size:   512 bytes
Serial number:        3KS52NTR
Device type:          disk
Transport protocol:   Parallel SCSI (SPI-4)
Local Time is:        Mon Dec  9 18:14:27 2013 CST
Device supports SMART and is Enabled
Temperature Warning Enabled

Good point! While typing that my ears were ringing with screams of "Parallel SCSI! Parallel SCSI!", which I neglected to respond to... thanks!

But that does not change things for stf92.