drees

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About drees

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  1. I think you're going down the right path, if you're only planning on RAID 1 or 0 and not booting off the array, Linux software raid works great with a bit of planning. As far as 3rd party IDE controllers go, people generally have the best luck with Promise, there really isn't anyone else who makes a good IDE controller at a decent price.
  2. I know it's possible to do a low-level clone of a drive in Linux using the dd command, don't know about doing that from Windows...
  3. der_halt is right. Contact 3ware with your problem, they will help you out. You also should be running the latest firmware/driver/3dm software as well, the latest software has the option of scheduling periodic media scans which is a *great* idea because as you found out, you don't often find bad sectors unless you start using them.
  4. drees

    What is the best RAID 1 card?

    Good choice with the 7210. You can't go wrong with that card. I didn't realize that the price has dropped so much with them recently, either!
  5. drees

    Please Recommend a SCSI Controller

    Second that vote for a Tekram. Cheaper than Adaptec and works just as well.
  6. Are you sure that it's the cable that's limiting performance? Moving 300Mbit/s+ is quite a lot of data, and a lot of computers just can't handle that type of bandwidth especially if the GigE card is sharing the bus with a storage controller, or has multiple ethernet cards, etc.
  7. Easy. The 3ware 7850 is the best IDE RAID controller. Looking at the StorageReview leaderboard, the WD800JB is the fastest IDE drive on the market today.
  8. For best performance, it'll definately be between system B and C. Basically, you're looking at the performance of two different drive setups: * 1 Cheetah X15 * 4 IDE RAID5 The performance of the RAID5 is going to highly depend on which IDE drives you use, and which 3ware card you get. The 3ware 7x50 cards perform a good deal faster in RAID5 than the other 3ware cards. Writing to RAID5 is generally fairly slow. So the Cheetah will definately win there. It will definately win any contest where you need to write a large number of small files quickly. Reading is another story, a 4-disk IDE RAID5 array will probably win any STR contest, but the Cheetah will still probably win with seeks. RAID5 is a great configuration for a file server which mainly serves large files. You get redundancy as well as a healthy performance boost.
  9. drees

    Duplexing Raid Controllers

    Your best bet in this case is to use Software RAID.
  10. I love my rounded cables. Will use rounded every chance I get. Best part is that they come in a variety of lengths which helps reduce the clutter. Flat cables seem to only come in 1-2 lengths, and no-one carries them all.
  11. As far as I can tell, this guy is just sharing the benchmarks he's found. kbench doesn't appear to sell anything. Neither does the guy's home page. Either way, it shows off the awesome scalability of the 3ware 7810...
  12. Yes, you can do that under Linux just fine. You can even use the IDE controller on the motherboard, SCSI drives off a SCSI controller, even drives plugged into a USB bus. (Not that I recommend that!) For maximum reliability and performance, I wouldn't recommend using more than 1 drive per channel. I just did some research on RAID5 and 3ware controllers. It turns out that the 6xxx series definately doesn't perform up to par on RAID5 because of performance issues. The 7xxx series doesn't suffer from this performance limitation, although their 7x50 series are supposed to be the ultimate in RAID5 performance. It would be interesting to see how the 7410 and 7450 compare. Using the storagereview database, you can see that the 7410 kills the 6400 when it comes to RAID5 throughput (although with seek heavy loads, performance is very close).
  13. Here are the main benefits/drawbacks of software vs hardware raid as I see them (at least on Linux which is what I assume you're using): Pros of Software RAID 1. Very flexible - You can RAID partitions, entire disks, almost anything. It's common to setup RAID arrays over RAID arrays. In fact, this is how you setup a RAID10 array. 2. Great performance - Uses the main CPU for processing RAID calculations which ends up working much faster than the majority of RAID cards out there, especially in RAID5. In RAID0 or 1, the performance difference typically isn't noticable since RAID0/1 doesn't need much CPU power. Cons of Software RAID 1. More difficult to configure - The flexibility gives so many different choices on how to raid makes it tougher to configure, not to mention that there isn't any handy utility to configure RAID arrays for you, you need to edit /etc/raidtab.conf. 2. Can't boot off a RAID5 array. Not a problem with hardware RAID. You can boot off RAID1 arrays, though. 3. Recovering from a disk failure is a bit trickier - Especially if the disk you're booting off is where LILO/GRUB is loaded from. Not as big of a deal if it's on a non-boot critical array. Basically, I recommend hardware RAID whenever you need/want to boot off of the RAID array. I'm not sure what you mean by "put the drives on a host adapter to have them work", can you be more specific?
  14. You saw that people have had problems with the 3ware 6410? I haven't had any with the 3 that I've installed into Linux systems, but I haven't tried RAID5, only RAID1 and RAID 10. If you could point me to the places you saw that people had trouble, I'd appreciate it. Here's my recipe for success: 1. Make sure you're running the latest kernel (in this case it means 2.4.18) 2. After upgrading kernel, install the 3dm tools. 3. Flash BIOS to latest version. Configure RAID and go! Keep in mind that with the 6410, you'll only be able to use 4 disks, as the 6410 only has 4 channels. You can't use more than one disk per channel on the 3ware cards. If you want to setup two 3-disk RAID5 arrays, you'll either need 2 6410s or the 8-port version.
  15. I'm not worried about snooping, any important data will be going over SSL or SSH, anyway. I'm more interested in keeping anyone going around looking for free internet access from leeching my bandwidth.