SSD recommendation for SLOG device

[Thomymaster]

@Ericloewe

Where did you get that information from that the Crucial M550 only has power-loss protection for its metadata rather than for everything? :)

 

[Mlovelace]

These have been great but they are a little pricy: http://www.newegg.com/Product/Produ...e=Kingston_SSDNow_E100-_-20-239-409-_-Product
Side note on these drives, TRIM commands will absolutely destroy these drives. They need to be connected to a HBA so that TRIM doesn't get passed.

 

[Ericloewe]

@Ericloewe

Where did you get that information from that the Crucial M550 only has power-loss protection for its metadata rather than for everything? :)

Anandtech. Don't have the link right now, but it's a recent post there. Google should also yield results.

 

[cyberjock]

These have been great but they are a little pricy: http://www.newegg.com/Product/Produ...e=Kingston_SSDNow_E100-_-20-239-409-_-Product
Side note on these drives, TRIM commands will absolutely destroy these drives. They need to be connected to a HBA so that TRIM doesn't get passed.

I'm not disputing your claim (I've never hard of that myself), but if that's true then I wouldn't trust those drives at all. Any SSD that can't do TRIM in 2014 clearly is AFU and shouldn't be trusted in a desktop, let alone a file server. That just screams of "failed design" in my book.

 

[Ericloewe]

I'm not disputing your claim (I've never hard of that myself), but if that's true then I wouldn't trust those drives at all. Any SSD that can't do TRIM in 2014 clearly is AFU and shouldn't be trusted in a desktop, let alone a file server. That just screams of "failed design" in my book.

Lookie here, it's our ol' friend Kingston.

As if we needed more reasons to stay away from Kingston.

 

[vikingboy]

Anandtech. Don't have the link right now, but it's a recent post there. Google should also yield results.

http://www.anandtech.com/show/8528/micron-m600-128gb-256gb-1tb-ssd-review-nda-placeholder

its in there, half way down. Enjoy, its a good read.

 

[Mlovelace]

I'm not disputing your claim (I've never hard of that myself), but if that's true then I wouldn't trust those drives at all. Any SSD that can't do TRIM in 2014 clearly is AFU and shouldn't be trusted in a desktop, let alone a file server. That just screams of "failed design" in my book.

They aren't meant for desktops these are enterprise SSDs and are designed for data center use, and therefore take into account that TRIM commands are not passed when in raid. The drives have firmware designed to compensate for the lack of TRIM in that environment.

Here is a write up on them: http://www.storagereview.com/kingston_ssdnow_e100_enterprise_ssd_review

As far as enterprise SSDs go they have good price to performance and capacitor backed power loss protection.


EDIT: Well never mind they published a firmware update to add TRIM support. I guess too many people were FUBARing their drives.

 

[Ericloewe]

They aren't meant for desktops these are enterprise SSDs and are designed for data center use, and therefore take into account that TRIM commands are not passed when in raid. The drives have firmware designed to compensate for the lack of TRIM in that environment.

Here is a write up on them: http://www.storagereview.com/kingston_ssdnow_e100_enterprise_ssd_review

As far as enterprise SSDs go they have good price to performance and capacitor backed power loss protection.

????

The Intel S3700s are half the price and sure as hell don't break if they receive a TRIM command.

 

[cyberjock]

That's kind of scary to me. Anytime they start doing RAID stuff I have to wonder "what is going on under the hood". I'm not saying TRIM is the answer for everything, it clearly isn't. Granted there isn't a "good" answer for RAID no matter what, but what about things like ZFS? How is *that* going to work? Only those that know what is "going on under the hood" would have good answers. :(

TRIM command breaking the drive is still a fail in my book. The drive should either process the TRIM (which is what I would have done) or ignore the TRIM commands. Letting it break the drive (which I couldn't validate from that link as it only says "not supported") is just 100% fail in my book.

 

[Mlovelace]

That's kind of scary to me. Anytime they start doing RAID stuff I have to wonder "what is going on under the hood". I'm not saying TRIM is the answer for everything, it clearly isn't. Granted there isn't a "good" answer for RAID no matter what, but what about things like ZFS? How is *that* going to work? Only those that know what is "going on under the hood" would have good answers. :(

TRIM command breaking the drive is still a fail in my book. The drive should either process the TRIM (which is what I would have done) or ignore the TRIM commands. Letting it break the drive (which I couldn't validate from that link as it only says "not supported") is just 100% fail in my book.

From what I gathered the original intent of these drives was to have better wear leveling and garbage collection in environments where TRIM was not an option (hardware RAID and IR flashed HBAs). Kingston has since updated the firmware to include TRIM.

None-the-less the Intel drives are better priced currently.

 

[cyberjock]

Interesting. I've been so busy these last few months I really haven't had time to keep up on some stuff (like the latest SSDs). Makes me sad to see I'm so far behind the times!

 

[joeschmuck]

These have been great but they are a little pricy: http://www.newegg.com/Product/Produ...e=Kingston_SSDNow_E100-_-20-239-409-_-Product
Side note on these drives, TRIM commands will absolutely destroy these drives. They need to be connected to a HBA so that TRIM doesn't get passed.

How in the world would TRIM destroy a drive faster? I want reputable proof.

The concept behind TRIM is it will erase unused sections of the SSD when commanded vice using built in Garbage Collection (GC).

TRIM is much preferable to the built in GC as it will reduce write amplification, something GC unfortunately will cause which will use up the drive life much fast.

You only want to use the GC if your OS doesn't support TRIM.

My Reference

 

[Mlovelace]

I

How in the world would TRIM destroy a drive faster? I want reputable proof.

The concept behind TRIM is it will erase unused sections of the SSD when commanded vice using built in Garbage Collection (GC).

TRIM is much preferable to the built in GC as it will reduce write amplification, something GC unfortunately will cause which will use up the drive life much fast.

You only want to use the GC if your OS doesn't support TRIM.

My Reference

I didn't say it destroys the drive faster, and if you keep reading the posts they have since patched the firmware. The drives were initially designed not to receive trim commands, they were intended to operate in hw raid environments where trim command don't happen. Kingston even had a big sticker that came on a fresh drives that warned against passing trim to the drives.
The symptom of trim command was to lock the drive and drop it from raid. I don't know why exactly, my guess is it corrupts the controllers drive map. You can look into it if you find it interesting but it's irrelevant now anyway. :)

 

[cyberjock]

I didn't say it destroys the drive faster...

You didn't?

Side note on these drives, TRIM commands will absolutely destroy these drives. They need to be connected to a HBA so that TRIM doesn't get passed.

Sure sounds that way to me....

 

[Mlovelace]

You didn't?



Sure sounds that way to me....

I said trim commands will absolutely destroy these drives.

Not, destroy these drives faster or shorten their life span.

As jock likes to say... I am bowing out of this conversation.

 

[jgreco]

Interesting. I've been so busy these last few months I really haven't had time to keep up on some stuff (like the latest SSDs). Makes me sad to see I'm so far behind the times!

Welcome to my state of being.

 

[Thomymaster]

Hi

I still have this question in mind:

@Ericloewe

Where did you get that information from that the Crucial M550 only has power-loss protection for its metadata rather than for everything? :)

 

[vikingboy]

It's in the thread I posted above, half way down the page.

 

[Thomymaster]

OK now i read through it. Really interesting (so the bottom line is Crucial M550 = no power-loss protection for in-flight data, only protection for already written data).