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Hot Swap Bays

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1:00 AM - 05/02/2008 by Patrick Schmid and Achim Roos

external raid storage

The hot-swappable drive bays of the 3Ware sidecar are made of metal and have a plastic front cover and handle. While Accusys offers drive locks for each drive, the frames are removable without protection mechanisms. Drives must be screwed into the frame.

external raid storage

Controller: 3Ware 9650SE-4LPME

external raid storage /

The 3Ware 9600 series has been on the market for a while. We took a look at the 9690SA at the end of last year, and the device did really well. In fact, it is still one of the better products on the market, although Adaptec and Areca provide equal or better performance. The fact is that 3Ware has a lot of experience, and the firm has refined its management tools quite a bit over time.

3Ware 3DM2 Software

external raid storage

The 3DM2 software is a well-known piece of software. It’s browser-based, which means that you can administer your 3Ware controller together with the Sidecar from any other system, once remote management is enabled. You first select the hard drives you want to use for your new RAID array (first picture). Then you select the RAID level, stripe size and RAID options. The third picture shows the warning in case the battery backup unit is missing — which, naturally, is the case unless you purchase it separately.

external raid storage

external raid storage

external raid storage

Talkback
cruiseoveride 05/03/2008 3:00 AM
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How does this compare to a DIY Linux Software RAID? Price? Performance? Reliability?
Unlike a hardware solution, if the controller card dies, you can forget about getting your data back since there is no "Standard" for RAID. On Linux you could just put the drives into another PC, as the meta-data for software RAID on Linux is not going to change across different versions of Linux.

candide08 05/05/2008 9:24 PM
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Thanks for the article - you have convinced me not to even consider either of these.

RAID 10 should be faster than any individual drive for reads and writes, and it should also be faster than RAID 5.

Something is wrong here - either with the hardware or the tests.

mutsu 05/15/2008 3:40 PM
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Actually performance isn't capped at 1 cable. There are a number of solutions that have multiple connections using iscsi, some even route between the connections dynamically on the server side and you can bond the ethernet connections on the client side to achieve performance maxing out the quantity of connections on the client machine. Of the ones that we tested (day job) there were only a few that met performance needs. All the arrays max the cable(s) out with straight read/write, but the performance on a number of array's drops drastically when you staring hitting them with more clients (20+) for read/write scenarios. Of course, these solutions are only really useful if you have, say, 100K (or more. Alot more in some cases) lying around.

a_k_a 08/23/2008 8:41 PM
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It's a crying shame that storage "solution" providers (and Tom's Hardware) don't look at the needs of the laptop marketshare. This would be just what I need, but the controller cards are deal-breakers.

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