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  1. #1
    3 Star Lounger E_OGRADY's Avatar
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    Hard Disk Drive Jumper

    I have 2 X 750 Gbyte HDD's in 2 X Lian_Li Mobile racks. That is 2 caddy's in drive bays. The drives are SATA Seagate Barracuda.
    On the rear of the drives is a jumper block that shows the jumper across what I would call pins 3 & 4.
    From what I can understand from the disk label this limits the the transfer to 1.5 Gb/s whereas with the jumper removed the transfer rate is 3 Gb/s.
    The exact diagram is SATA Power - SATA Drive - Jumper Block the pins are to the extreme right.
    The wording from the disk jumper over pins 3 & 4 Limit to 1.5 Gb/s Operation
    No jumper 3 Gb/s operation
    This seems to repeat myself but I want to be sure I convey correctly.
    Should I use the 1.5 or the 3 Operation?
    I am running an AMD 6400+ processor on a ASUS MS2nSLI deluxe motherboard. 2 Gbtes memory.

  2. #2
    Plutonium Lounger
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    Re: Hard Disk Drive Jumper

    See what'cha think after reading this: Seagate Technology - Serial ATA Jumpers and Cabling

  3. #3
    3 Star Lounger E_OGRADY's Avatar
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    Re: Hard Disk Drive Jumper

    The way I read that is "The jumper should and can be removed on my system"
    I tried to find that advice on the seagate site but I was obviously searching on the incorrect critea.
    Again I thank you.

  4. #4
    Plutonium Lounger
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    Re: Hard Disk Drive Jumper

    That's what I thought, Ed, but I thought I'd better let YOU read it and make the call. Sure is worth a shot to see what your "throughput" is.

  5. #5
    3 Star Lounger E_OGRADY's Avatar
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    Re: Hard Disk Drive Jumper

    Thank you agai Al, I will let the Lounge know, previous Posts of mine reveal problems with this system since new (12 months ago) The RAID 1 on the boot drive was taken from the nVidia (onboard) to Adaptec PCI and the disks changed from Seagate to Samsung. That fixed the RAID problem but I now wonder if it might have been a reduction in the transfer rate. The two HDD's were continually in Verify state not in an Optimal state.
    I have just checked the two disks on the table and they both have jumpers. Funny

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