Re: Samsung 840 EVO

["Günter Waller" <g.wal@web.de>]

[-- Attachment #1: Type: text/plain, Size: 1266 bytes --]

Hi Martin,
here you are - the second command, however, did not seem to produce
anything useful.
But beware: this is the old firmware, EXT0BB6Q, i.e. the one with the
performance issues (not seen on my machine yet), not the one that causes
the problems with fstrim - named EXT0DB6Q.
As I mentioned I shy away from upgrading at this point, not knowing
whether my Linux system runs fstrim somewhere behind my back. I am not
that deeply involved in the inner workings of the kernel as you guys.
This is my bread and butter machine, I'd rather not expose it to risk if
I can help it.
Cheers
Günter


Am 04.05.2015 um 17:28 schrieb Martin K. Petersen:
>>>>>> "Günter" == Günter Waller <g.wal@web.de> writes:
> 
> Günter> the subject Samsung SSD is having performance issues with "old
> Günter> data" which Samsung now addresses with a new firmware.
> 
> I wonder if they enabled the same botched queued discard that they did
> in 850 Pro?
> 
> If someone has an 840 Evo with the new firmware it would be helpful for
> us to receive the output of:
> 
> # hdparm -I /dev/sdN
> # smartctl -l gplog,0x13 /dev/sdN
> 
> I think I might have an 840 in the lab. Will head down and update it
> later this week unless somebody beats me to providing the information
> above.
> 

[-- Attachment #2: 840evo.txt --]
[-- Type: text/plain, Size: 3616 bytes --]

hdparm -I /dev/sda
/dev/sda:

ATA device, with non-removable media
	Model Number:       Samsung SSD 840 EVO 250GB               
	Serial Number:      S1DBNSBF767383T     
	Firmware Revision:  EXT0BB6Q
	Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
	Used: unknown (minor revision code 0x0039) 
	Supported: 9 8 7 6 5 
	Likely used: 9
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:  488397168
	Logical  Sector size:                   512 bytes
	Physical Sector size:                   512 bytes
	Logical Sector-0 offset:                  0 bytes
	device size with M = 1024*1024:      238475 MBytes
	device size with M = 1000*1000:      250059 MBytes (250 GB)
	cache/buffer size  = unknown
	Nominal Media Rotation Rate: Solid State Device
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 = 1	Current = 1
	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
	   *	NOP cmd
	   *	DOWNLOAD_MICROCODE
	    	SET_MAX security extension
	   *	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
	   *	READ_LOG_DMA_EXT equivalent to READ_LOG_EXT
	   *	DMA Setup Auto-Activate optimization
	    	Device-initiated interface power management
	   *	Asynchronous notification (eg. media change)
	   *	Software settings preservation
	   *	SMART Command Transport (SCT) feature set
	   *	SCT Write Same (AC2)
	   *	SCT Error Recovery Control (AC3)
	   *	SCT Features Control (AC4)
	   *	SCT Data Tables (AC5)
	   *	reserved 69[4]
	   *	DOWNLOAD MICROCODE DMA command
	   *	SET MAX SETPASSWORD/UNLOCK DMA commands
	   *	WRITE BUFFER DMA command
	   *	READ BUFFER DMA command
	   *	Data Set Management TRIM supported (limit 8 blocks)
Security: 
	Master password revision code = 65534
		supported
	not	enabled
	not	locked
		frozen
	not	expired: security count
		supported: enhanced erase
	2min for SECURITY ERASE UNIT. 8min for ENHANCED SECURITY ERASE UNIT. 
Logical Unit WWN Device Identifier: 50025388a05d2afa
	NAA		: 5
	IEEE OUI	: 002538
	Unique ID	: 8a05d2afa
Checksum: correct

*************************************************************
smartctl -l gplog,0x13 /dev/sda
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.13.0-51-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

General Purpose Log 0x13 does not exist (override with '-T permissive' option)