jmke

Corsair’s M64 SSD 64GB, 2.5 inch drive doesn’t have such fast read and write times, as it reads 90MB/s and writes 70MB/s but this should be enough to beat most of the mechanical hard drives on market.

The issue with Corsair's soon to be available M64 drive is that OCZ Solid 60GB, 2.5 inch drive is available for €157 and it reads 155MB/s and writes 90MB/s. Corsair can't even touch these read times and availability of these drives implicates that we might be seeing some price wars in SSD market that will drive the prices even further down. That is a welcome change.

Change on request of Corsair : the real figures should be 170Mb/s read, 100Mb/s write

http://www.fudzilla.com/index.php?op...04&It emid=36

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Rutar

I wouldn't release that pos, only tarnishes the brandname.

jmke

anybody know what controller and cache size this SSD will have?

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jmke

found the answer:
- JMicron JM602b
- No Cache

not very promising.

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macgizmoguy

I dunno, I see stats putting the M64 at *peak* R/W speeds of 170/100 which puts it a notch above most SSD's from 2008 and is still respectable for 2009. Alot of laptops and 'pooters out there that'd be good for an SSD upgrade are SATA I speed controllers anyways. And ultimately, it isn't about the NUMBERS. It's how dramatically better using a system with nearly any currently shipping SSD *FEELS* in day to day stuff.

jmke

it's that aspect that worries me most with any JMicron SSD without enough cache (or no cache in this case)


even a dual Jmicron JM602b SSD is slower than a 5400rpm Laptop HDD.
and when your OS or any other app/games starts writing small 4kb file chunks (which happens a lot) you get these nightmare scenarios:


...


must read for JMicron version A: http://www.anandtech.com/cpuchipsets...spx?i=3403&p=9
then follow-up with JMicron B , dual Jmicron B and the Vertex vs Intel http://www.anandtech.com/storage/sho...spx?i=3531&p=1

then latest Vertex FW catches up with Intel and becomes best performance/price SSD and only other alternative to Intel X25-M http://www.anandtech.com/storage/showdoc.aspx?i=3535


the only way a JMicron JM602b equipped SSD is going to be faster OVERALL compared to a HDD is if they use two, put them in RAID, and have plenty of cache onboard (64mb+). But even then you might still run into the occasional stutter

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thorgal

After a quick contact with Corsair it seems that FUD got the wrong information : it should read 170Mb/sec read ; 100 Mb/sec write, in other words, in line with the other manufacturers...

I have adapter the first post with the correct figures.

Corsair sees 2 customer types for these drives :

- notebook owners (mostly on Sata 1)
- power users who raid them up on a card (2+ drives)

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jmke

this doesn't change A THING about my previous post; a JMicron drive without RAM buffer will give you an experience worse than a 5400rpm laptop HDD when multi-tasking.

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thorgal

Did I say anything about your post ? Corsair contacted me and asked to correct the figures...

Does not mean I totally agree with you either, been using an SSD without cache for some time now (windows 7 and XP) and honestly have not yet experienced any problem. I've also run Vista64 with 4 drives and a raid card, zero issues.

Not saying the issue isn't there, mind you, it has been documented enough by now.

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jmke

it strongly depends on your usage; with only a few apps open the chances or running into issues is minimal at best; but heavier multi-tasking will increase I/O and queue depth, and will stress the JMicron chip to failure, with onboard cache it takes a bit longer and that resolves most of the remaining problems.

launch IO meter 4kb random write to see how JMicron SSD's fare compared to Indilinx or Samsung controller.

My reaction is purely based on the specs; if I can get a €157 64Gb SSD with a proper controller and only 155MB/s read and writes 90MB/s, I will buy it, test and and most likely recommend it over the Vertex SSD which costs €180 for 30Gb. (It doesn't matter much, if at all, if the max uptained speeds were ~15mb/s off) But as this SSD is not going to switch controller at this point, and Corsair already is prepping their Samsung based SSD with much higher retail price... you know the rest

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