SOLVED Would you recommend the Toshiba DT01ACA300 HDD?

[VladTepes]

Around 24 hours mate

 

[VladTepes]

Anyway all appears to be in order.

Code:

root@Remus:~ # smartctl -a /dev/ada6
smartctl 6.5 2016-05-07 r4318 [FreeBSD 11.0-STABLE amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:	 Toshiba 3.5" DT01ACA... Desktop HDD
Device Model:	 TOSHIBA DT01ACA300
Serial Number:	37T9H31AS
LU WWN Device Id: 5 000039 fe6d26785
Firmware Version: MX6OABB0
User Capacity:	3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:	 512 bytes logical, 4096 bytes physical
Rotation Rate:	7200 rpm
Form Factor:	  3.5 inches
Device is:		In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:	Tue Sep 19 20:45:18 2017 AEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x84) Offline data collection activity
										was suspended by an interrupting command from host.
										Auto Offline Data Collection: Enabled.
Self-test execution status:	  (   0) The previous self-test routine completed
										without error or no self-test has ever
										been run.
Total time to complete Offline
data collection:				(21648) seconds.
Offline data collection
capabilities:					(0x5b) SMART execute Offline immediate.
										Auto Offline data collection on/off support.
										Suspend Offline collection upon new
										command.
										Offline surface scan supported.
										Self-test supported.
										No Conveyance Self-test supported.
										Selective Self-test supported.
SMART capabilities:			(0x0003) Saves SMART data before entering
										power-saving mode.
										Supports SMART auto save timer.
Error logging capability:		(0x01) Error logging supported.
										General Purpose Logging supported.
Short self-test routine
recommended polling time:		(   1) minutes.
Extended self-test routine
recommended polling time:		( 361) minutes.
SCT capabilities:			  (0x003d) SCT Status supported.
										SCT Error Recovery Control supported.
										SCT Feature Control supported.
										SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME		  FLAG	 VALUE WORST THRESH TYPE	  UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate	 0x000b   100   100   016	Pre-fail  Always	   -	   0
  2 Throughput_Performance  0x0005   140   140   054	Pre-fail  Offline	  -	   68
  3 Spin_Up_Time			0x0007   100   100   024	Pre-fail  Always	   -	   0
  4 Start_Stop_Count		0x0012   100   100   000	Old_age   Always	   -	   1
  5 Reallocated_Sector_Ct   0x0033   100   100   005	Pre-fail  Always	   -	   0
  7 Seek_Error_Rate		 0x000b   100   100   067	Pre-fail  Always	   -	   0
  8 Seek_Time_Performance   0x0005   124   124   020	Pre-fail  Offline	  -	   33
  9 Power_On_Hours		  0x0012   100   100   000	Old_age   Always	   -	   76
 10 Spin_Retry_Count		0x0013   100   100   060	Pre-fail  Always	   -	   0
 12 Power_Cycle_Count	   0x0032   100   100   000	Old_age   Always	   -	   1
192 Power-Off_Retract_Count 0x0032   100   100   000	Old_age   Always	   -	   2
193 Load_Cycle_Count		0x0012   100   100   000	Old_age   Always	   -	   2
194 Temperature_Celsius	 0x0002   171   171   000	Old_age   Always	   -	   35 (Min/Max 25/53)
196 Reallocated_Event_Count 0x0032   100   100   000	Old_age   Always	   -	   0
197 Current_Pending_Sector  0x0022   100   100   000	Old_age   Always	   -	   0
198 Offline_Uncorrectable   0x0008   100   100   000	Old_age   Offline	  -	   0
199 UDMA_CRC_Error_Count	0x000a   200   200   000	Old_age   Always	   -	   0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description	Status				  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline	Completed without error	   00%		61		 -
# 2  Extended offline	Completed without error	   00%		 5		 -
# 3  Short offline	   Completed without error	   00%		 0		 -

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
	1		0		0  Not_testing
	2		0		0  Not_testing
	3		0		0  Not_testing
	4		0		0  Not_testing
	5		0		0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

time to REPLACE it in the array :)

 

[VladTepes]

OK well resilvering has finished/ (It's a new rebuild so only 2.5TB of 12 total in use),
Status back from critical-degraded to OK!

That's pretty painless once you know what you're doing !

Thanks all for your help !

 

[Inxsible]

Cool. Glad you got it sorted out.

 

[MrToddsFriends]

Around 24 hours mate

Performance seems to be (at least to me and at least somewhat) suspiciously good.

Total badblocks data volume transferred:
<disk capacity> * <# of badblocks patterns> * <read/write factor> =
3.00 TB * 4 * 2 =
24 TB

Average (read or write) badblocks sequential data rate, based on rough 24 h run time estimate:
24 TB / 24 h =
24 * 10^6 MB / (24 * 3600 s) =
278 MB/s

I'm surprised by an an average (not maximum!) sequential transfer rate of over 250 MB/s from an 7200 rpm HDD. But if this is the only issue with this shiny new HDD ...

 

[Johnnie Black]

I'm surprised by an an average (not maximum!) sequential transfer rate of over 250 MB/s from an 7200 rpm HDD. But if this is the only issue with this shiny new HDD ...

I don't use badblocks and didn't check your math, but I do know these disks and average sequential transfer for them is +/- 150MB/s.

 

[VladTepes]

Yeah strange but no other indicators of any issues. Ill just set up smart testing periodically and keep an eye on it.

 

[MrToddsFriends]

Yeah strange but no other indicators of any issues. Ill just set up smart testing periodically and keep an eye on it.

Question from a curious individual: Could you please take a Reporting -> Disk -> Disk I/O screenshot of this disk from the date in question and show it here? A 24h period should show at least half of the badblocks run.

 

[Bidule0hm]

Performance seems to be (at least to me and at least somewhat) suspiciously good.

Total badblocks data volume transferred:
<disk capacity> * <# of badblocks patterns> * <read/write factor> =
3.00 TB * 4 * 2 =
24 TB

Average (read or write) badblocks sequential data rate, based on rough 24 h run time estimate:
24 TB / 24 h =
24 * 10^6 MB / (24 * 3600 s) =
278 MB/s

I'm surprised by an an average (not maximum!) sequential transfer rate of over 250 MB/s from an 7200 rpm HDD. But if this is the only issue with this shiny new HDD ...

Excepted it didn't scan 24 TB but only what is used at that time + some metadata so the speed is far less than 250 MB/s.

 

[MrToddsFriends]

Excepted it didn't scan 24 TB but only what is used at that time + some metadata so the speed is far less than 250 MB/s.

This is not a scrub, a badblocks -ws /dev/ada6 reads and writes the whole device four times regardless of which sectors are used at that time and even regardless if there is/was a file system on that device prior to the badblocks run.

https://www.freebsd.org/cgi/man.cgi?query=badblocks
https://forums.freenas.org/index.ph...shiba-dt01aca300-hdd.57701/page-2#post-407566

 

[VladTepes]

MrTodd - just saw your request, Will try to remember to do so ! Cheers

 

[Bidule0hm]

Ah, sorry, didn't saw you were talking about badblocks.

But I guess your drive isn't 24 TB so where this number come from?

 

[MrToddsFriends]

Ah, sorry, didn't saw you were talking about badblocks.

But I guess your drive isn't 24 TB so where this number come from?

badblocks -ws <device> does 4 complete device writes (for 4 different patterns 0xaa, 0x55, 0xff and 0x00) and 4 complete device reads as explained in the man page, so my calculation is

Total badblocks data volume transferred:
<disk capacity> * <# of badblocks patterns> * <read/write factor> =
3.00 TB * 4 * 2 =
24 TB

In the past I did accomplish badblock scans on several 2 TB and 3 TB HDDs and the amount of data transferred coincided with this very simple calculation. In fact, I would not know how to calculate the amount of data otherwise.

 

[Bidule0hm]

Ok, so from that it seems that the speed is correct but it seems to be very high. Well, I guess you can be happy about that :D

 

[MrToddsFriends]

Ok, so from that it seems that the speed is correct but it seems to be very high. Well, I guess you can be happy about that :D

It's @VladTepes' Toshiba DT01ACA300 that's showing this behavior. I was hoping that we could gain some insight here about this figure of merit.

 

[farmerpling2]

While that might be true, for an average home user, the differences in those values tend to be so close that it shouldn't matter too much for home use. Also, if you do way too much research in buying them, you might just end up doing research and not have any time left to buy the damn hardware

Following up on this...

The spreadsheet provides a lot of the information, making it quite easy to compare. It is not perfect, but spending a few minutes with it you can get a pretty good idea what is the best price per TB based upon warranty, power usage, etc.

If you did not have the spreadsheet it would be a pain in the rear, which is what it is like sometimes when I update the spreadsheet.;)

Always look at the enterprise drives also. Sometimes they are the better deal! Not always, but I have seen it for 3TB a couple times.

Buying good drives for the home user is very important because they do not have 60 drives with 3 or 4 spares to play with, like an enterprise does. Most home users have enough drives to running and will have to buy a replacement on failure.

 

[VladTepes]

Question from a curious individual: Could you please take a Reporting -> Disk -> Disk I/O screenshot of this disk from the date in question and show it here? A 24h period should show at least half of the badblocks run.

I'm not sure how (if its even possible) to magnify all the data onto one legible screen... anyway...

 

[MrToddsFriends]

I'm not sure how (if its even possible) to magnify all the data onto one legible screen... anyway...
View attachment 20715 View attachment 20716

These two graphs clearly show a duration of approx. 42 h (or even slightly more, if one looks closely) for the badblocks run (Sat 23:00 ... Mon 17:00).

So my simple calculation goes: Average (read or write) badblocks sequential data rate, based on rough 42 h run time estimate:
24 TB / 42 h =
24 * 10^6 MB / (42 * 3600 s) =
159 MB/s

No discrepancy or suspicious numbers left.

About "magnifying all the data onto one legible screen": Should be possible if one fiddles around with the rrd data (Round Robin Database) directly, as generated by collectd/RRDTool. At least as long one has a copy of the original data, which get thinned out over time.

 

[VladTepes]

Thanks.

I'm not even going to ask about that RRD... life is complicated enough already !

Cheers :)