DEAD: HGST SSD1600MM - HUSMM1640ASS201 - 400GB US $47.95 OBO

whitey

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Jun 30, 2014
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Got my 4 today, 19AUG2017, looking like brand new/spares, have not placed in system yet and sg_formatted but hell maybe it isn't even necessary if they are already 512, need to read more on this type 2 protection thang I suppose.

Stellar deal, will be pairing up w/ 4 others I have to make my DR/replication pool happier/stop bitching at me abt pool utilization coming from my 800GB models in main AFA VM pool that runs my typical 50-60 VM's.
 
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josh

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Oct 21, 2013
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Any idea how the SMM is different from the SML? I see that they're both MLC drives. Is $30 more for the SSL is a better idea?
 

itronin

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Nov 24, 2018
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@josh , I'm guessing you meant SML instead of SSL.

I did not dig too deep on the differences - based on the published specs the two drives are rated similarly. Based on initial testing impressions I'd say the SMM drives compare similarly to the SML drives. writes (with type 2 protection) seemed to be 15-25% faster in my very basic testing. (@ 4K - 64k RS.) My not very controlled testing environment showed without type 2 protection that writes were basically the same between the two drives +/- < 5%.

I do see some 400GB HUSML4040ASS601 on the bay ~$37.00 OBO - $40.00 but the majority of the SML drives do seem to be a bit more expensive than this deal. However the majority of the SMM on the bay seem to be in the ~$100.00+ range.

Given the either new or close to new state of the SML drives in this deal and apparently improved write performance I still believe this is a better deal.

quick performance test images attached, SMM, SML, included for comparison Samsung PM853T, intel P3605
SML drives had type 2 protection enabled at the time of testing.

HGST-HUSMM1640ASS201.png HGST-HUSML4040ASS601.png Samsung-PM853T-HUSSL4010BSS6001.png intel-p3605.png
 

semidetached

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Sep 18, 2018
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The first two numbers are the maximum size of the model of drives, so HUSML4040 are 400GB drives from a model (SSD400M) that maxed out at 400GB. The ML here refers to MLC flash instead of SL for SLC flash. The interface is 6Gb/s SAS.

The HUSMM1640 drives are from a model (SSD1600MM) with a max of 1.6TB. Here, MM is their mid-endurance line (10 DW/D) and the entire generation is MLC only. There are also MH (high endruance) and MR (read optimized) drives. The interface is 12Gb/s SAS.

Apparently Western Digital broke all the pdf datasheet links to older HGST drives, so this info is hard to come by. I've attached some pdfs.
 

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itronin

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Yes. That's an important difference.

I personally tend not to think about the drives' speed difference since all of my controllers and expanders are SAS2.
That actually makes a level playing field for my testing.

Interesting side note and difference between the drives when connected to my CSE-217:

SAS drives
the HUSML4040ASS601 drive activity lights are ON and blink with activity.
the HUSMM1640ASS201 drive activity lights are OFF and blink with activity. ***

By comparison my SATA drives:
My intel and samsung SATA ssd drive activity lights are OFF and blink with activity.
I tested some sandisk cloudspeed eco gen ii SATA ssd drives and the drive activity lights are ON and blink with activity. ***

I thought the supermicro rule of thumb was that SAS drive lights are ON and blink with activity and SATA drive lights are OFF and blink with activity. Obviously exceptions to the rule.

There's a thread with a post by @BLinux that talks about the drive light differences on the supermicro expanders and backplanes - can't find it at the moment.
 

josh

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Oct 21, 2013
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@josh , I'm guessing you meant SML instead of SSL.

I did not dig too deep on the differences - based on the published specs the two drives are rated similarly. Based on initial testing impressions I'd say the SMM drives compare similarly to the SML drives. writes (with type 2 protection) seemed to be 15-25% faster in my very basic testing. (@ 4K - 64k RS.) My not very controlled testing environment showed without type 2 protection that writes were basically the same between the two drives +/- < 5%.

I do see some 400GB HUSML4040ASS601 on the bay ~$37.00 OBO - $40.00 but the majority of the SML drives do seem to be a bit more expensive than this deal. However the majority of the SMM on the bay seem to be in the ~$100.00+ range.

Given the either new or close to new state of the SML drives in this deal and apparently improved write performance I still believe this is a better deal.

quick performance test images attached, SMM, SML, included for comparison Samsung PM853T, intel P3605
SML drives had type 2 protection enabled at the time of testing.

View attachment 12161 View attachment 12162 View attachment 12163 View attachment 12164
I'm talking about the SSL actually. I see them going for $80-$100 on eBay and those are SLCs. Still trying to figure out the meaning of the numbers in these HGST model numbers.
 

whitey

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Figured I'd throw this in here in case anyone wants the 'easy button' fix. Thought I saw it 'somewhere' in the thread but I must be blind cause I can't find it now.

To remove Type 2 data protection simply issue the following cmd using the sg3_utils suite/utilities, I've done this via CentOS7 in the past but used native/inherent sg utilities in FreeNAS today.
Code:
sg_format --format --size=512 --fmtpinfo=0 /dev/da7 -v
 
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josh

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Btw what are you guys using the drives for? I don't have any use for 400GB SSDs but I'm looking for some reason to get some of them since they're decently priced.
 

semidetached

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Sep 18, 2018
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Btw what are you guys using the drives for? I don't have any use for 400GB SSDs but I'm looking for some reason to get some of them since they're decently priced.
5 node (w/ 4 drives per node) Ceph cluster for OpenStack
 

josh

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5 node (w/ 4 drives per node) Ceph cluster for OpenStack
How are you housing the drives? 4 node cloud servers? Looking for some hardware that justifies the cost of only 4 small capacity drives per node.

Btw prices have gone up to $55 ea
 

itronin

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Updated the title to $55.00

186 sold. someone purchased 70 drives. IIRC there were ~190 or so when I posted this. I don't know if seller has more and updated their inventory.
 
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semidetached

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Sep 18, 2018
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How are you housing the drives? 4 node cloud servers? Looking for some hardware that justifies the cost of only 4 small capacity drives per node.
I have a 2U 4 node Intel server (H2216 w/ S2600JF nodes) that has 4 2.5" drives per node. The controller node is an Intel 1U with 8 bays.

I mostly use Linux VMs and containers with smaller images. This setup is a cost effective way to play around with Ceph, OpenStack, and other "cloudy" things for work. I couldn't afford populating all bays with larger drives and for the price the endurance/performance on the HGST drives can't be beat.
 

nephri

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I have from a while 12x HUSMM8080ASS200 (SSD800M instead of SSD1600M but with 800 Gb capacity)
I didn't really know which are performance difference between theses models but i'm really happy with theses (rock solid).
 

josh

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Oct 21, 2013
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I have a 2U 4 node Intel server (H2216 w/ S2600JF nodes) that has 4 2.5" drives per node. The controller node is an Intel 1U with 8 bays.

I mostly use Linux VMs and containers with smaller images. This setup is a cost effective way to play around with Ceph, OpenStack, and other "cloudy" things for work. I couldn't afford populating all bays with larger drives and for the price the endurance/performance on the HGST drives can't be beat.
Having a little difficulty justifying full SSDs for home VM usage. Have you tried running these as cache drives for SATA/SAS?
 

josh

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Oct 21, 2013
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I have from a while 12x HUSMM8080ASS200 (SSD800M instead of SSD1600M but with 800 Gb capacity)
I didn't really know which are performance difference between theses models but i'm really happy with theses (rock solid).
Use case? I assume the price/GB much lower for the 800Gs?