vitaminc

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About vitaminc

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  1. MLC will generally be faster because they have two switches per transistor. The downside is that they dies much faster than SLC and dont scale well at lower geometries. SLC will always be more reliable for high IO mission critical stuff. My first SSD is SLC 64G back in 07/08. SLC pricing has stay very high but MLC has came down drastically.
  2. vitaminc

    most reliable hard drive?

    That's not enough samples to draw a conclusion...
  3. vitaminc

    Finally, dell to use AMD

    AMD CPU architecture isnt that much better. What made it scales well is Hypertransport, not its architecture.
  4. Hi, I am now on the market for softwares that can completely transfer HDD data so I can migrate my current OS from old HDD onto my new HDDs. I have found: HDClone TrueImage 9.0 HDClone doesn't seem to support 29320-R or 2130SLP, but I have to run its test utility to find out. Anyone has the experience of transfering HDD data from a PATA drive to a SCSI RAID? All helps will be greatly appreciated. regards, HCL
  5. vitaminc

    PCI bus i killing me....

    Asus K8N-LR and P5WDG2-WS were both released for quite some time now. Both of them has PCI-X for a ATX single processor board. I first saw them in Feb/Mar timeframe. I guess they are out in Asia first and only handful of retail/system builder got them here in US.
  6. vitaminc

    SCSI performance problems

    Not sure, but it looks kinda capped to me? Have you check (in Win XP) the bus speed negotiated? Sometimes the BIOS shows 320 but then it only negotiated 160 for some reasons.
  7. vitaminc

    PCI bus i killing me....

    The Asus K8N-LR has 2 PCI-X slots. When used individually, it can operate on 133MHz x 64bit. When both are used, they operate on 100MHz x 64bit. It has no AGP slot though (but has on-board video). http://www.gamepc.com/shop/product.asp?cat...t%5Fid=K8N%2DLR I read thru the 939Dual-SATA2 manual and it doesnt mention anything about using PCIe/AGP together, so guess you should mail their sales rep.
  8. vitaminc

    PCI bus i killing me....

    PCI has bandwidth of 33Mhz * 32 bit = 132MB/s. So you are hitting the ceiling. Look at the layout of the mobo, it seems like it can be used at the same time as long as you choose primarily gfx card at AGP in BIOS, but not sure. Why not just get a mobo that has PCIe 16x and PCIe 8x at the same time? Or some workstation mobo with PCIe and PCI-X? PCI-X solves the problem in the long run as there ain't too many PCIe 8x mobo around with SLi/XF capabilities.
  9. vitaminc

    29320 HostRAID + Cheetah 15k.3 Problems

    Yes, termination is set to automatic as the Adaptec cable has the terminator at the end. I tried to use the Adaptec Storage Manager and find the channel has 160MB/s bandwidth. Since I am using 29320-R on PCI bus, I guess that's normal. The HDDs, however, negotiated 40MB/s, confirming the HD Tach results. It seems that my 29320-R channel A is running at 40MB/s and channel B is running at 320MB/s. All the HDD are installed on channel B but are somehow limited by channel A. Terminations shouldn't be a problem as the HDDs works fine before I raid them together. Anyone has similar experience? Any pointers would be extremely helpful.
  10. vitaminc

    29320 HostRAID + Cheetah 15k.3 Problems

    Yes, termination is set to automatic as the Adaptec cable has the terminator at the end. I tried to use the Adaptec Storage Manager and find the channel has 160MB/s bandwidth. Since I am using 29320-R on PCI bus, I guess that's normal. The HDDs, however, negotiated 40MB/s, confirming the HD Tach results.
  11. vitaminc

    29320 HostRAID + Cheetah 15k.3 Problems

    Here is the result of the HDTach test. The blue line is the original drive, the red is the RAID0.
  12. Hi, I am running 2x Cheetah 15k.3 (Firmware #0005) in RAID0 on Adaptec 29320-R. Both my HDDs were all normal (i.e. 60-70MB/s STR, less than 6ms Random Access, 110-120MB/s Burst Read Speed) before I enable HostRAID to RAID0 them together. After I RAID0 them together and installed Windows XP SP2, the transfer rate of the RAID became capped at 40MB/s ( about 35MB/s STR, 35MB/s Burst Read, etc). So for some reason my bus is somehow downgraded to UW SCSI. I checked channel B of the adapter (where my HDDs located at), all drives are detected as up to 320MB/s transfer rate. I checked channel A of the adapter (with no HDD connected), all "drives" are detected as up to 40MB/s. I think this is normal since channel A is used to support legacy SCSI. Both channel A & B are hostRAID enabled. (I tried to enable only B, and yields the same results. So if anyone could offer some insight on my mistakes, I would greatly appreciate it.
  13. vitaminc

    HD Temperature

    Not sure about Raptors, but you could always try WD's website and search for operating specifications. If you are at the midpoint of the operating temperature, you have nothing to worry about. My $0.02
  14. Your terminator, adaptor, HDD looks fine to me. Your drive will not function to its full capacity with adaptec 2940UW. That's Ultra2/wide SCSI. Which adaptor did you use for the HDTach benchmark? If you were using 2940UW, you should try to use 19160 and run HD Tach again. And have you try running the benchmark with the jumper(s) on the adaptor removed? You mentioned "The SCSI card has a built in terminator on the end", is it card or cable or the adaptor? BTW, can't see the cable too well, but is it a regular LVD cable or U160/320 compliant cable? P.S. Try CTRL+A when you boot to go into Adaptec's SCSI BIOS Utility, there should be a table of each individual drive's transfer rate. (can't remember 100% since 2940U2W was a long time ago for me. )