Q: Why SATA hdd has a jumper place for ....

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comitter

limiting the speed to 1.5Gbs, or if left empty then it's 3gbs
operation.

Which to me it doesn't have sense ...

so why is this place jumpered on 1.5Gbs, when we know puting the hard
drive on both connectors, it will adapted automatically....!?


!?
 
comitter said:
limiting the speed to 1.5Gbs, or if left empty then it's 3gbs
operation.

Which to me it doesn't have sense ...

so why is this place jumpered on 1.5Gbs, when we know puting
the hard
drive on both connectors, it will adapted automatically....!?


!?
Click to expand...

Not sure what you mean by that last para. Anyway, SATA I
compatibility is provided to allow the HDD to be used with early
SATA motherboards that had only SATA I capability. A comparable
situation with still earlier technology was a jumper on PATA HDDs
to limit usable size to 32GB. Unless these jumpers are in place,
some older motherboards simply cannot detect the newer drives.
 
Not sure what you mean by that last para. Anyway, SATA I
compatibility is provided to allow the HDD to be used with early
SATA motherboards that had only SATA I capability. A comparable
situation with still earlier technology was a jumper on PATA HDDs
to limit usable size to 32GB. Unless these jumpers are in place,
some older motherboards simply cannot detect the newer drives.
Click to expand...


Is there a chance for some booting problems, or it just straightly,
firmly: doesn't recognize the disk ?

Sometimes, there are several issues when having a complex system...
 
sitotisak said:
Is there a chance for some booting problems, or it just
straightly,
firmly: doesn't recognize the disk ?

Sometimes, there are several issues when having a complex
system...
Click to expand...

In all the cases I've personally come across, it's a
straightforward case of not recognizing the disk at all. No
chance of attempting to boot.
 
comitter said:
limiting the speed to 1.5Gbs, or if left empty then it's 3gbs
operation.

Which to me it doesn't have sense ...

so why is this place jumpered on 1.5Gbs, when we know puting the hard
drive on both connectors, it will adapted automatically....!?
Click to expand...

Because some SATA controllers were designed wrong and won't adapt
automatically. According to SomeJoe7777 at Tom's Hardware, they
include:

Via VT8237
Via VT8237R
Via VT6420
Via VT6421L
SIS 760
SIS 964
Intel 82801EB (ICH 5/5R)

I'm not sure about the Intel 82801EB because I have a Dell Optiplex
GX270 with Intel 865G chipset, which I think includes the 82801EB
chip, and I've had no problems using this computer with Samsung,
Hitachi, Seagate, and WD drives configured for 3.0Gb/s. OTOH those
VIA chips definitely won't work at all with them and require SATA
drives be limited to 1.5Gbs, regardless of the driver or BIOS. VIA
gives the excuse that those chips are old, but even older 1.5Gb/s SATA
chips from Promise (Marvell), Intel, and I think Silicon Image get
along just fine with 3.0Gb/s drives.
 
larry moe 'n curly said:
Because some SATA controllers were designed wrong and won't adapt
automatically. According to SomeJoe7777 at Tom's Hardware, they
include:

Via VT8237
Via VT8237R
Via VT6420
Via VT6421L
SIS 760
SIS 964
Intel 82801EB (ICH 5/5R)

I'm not sure about the Intel 82801EB because I have a Dell Optiplex
GX270 with Intel 865G chipset, which I think includes the 82801EB
chip, and I've had no problems using this computer with Samsung,
Hitachi, Seagate, and WD drives configured for 3.0Gb/s. OTOH those
VIA chips definitely won't work at all with them and require SATA
drives be limited to 1.5Gbs, regardless of the driver or BIOS. VIA
gives the excuse that those chips are old, but even older 1.5Gb/s SATA
chips from Promise (Marvell), Intel, and I think Silicon Image get
along just fine with 3.0Gb/s drives.
Click to expand...

Hmmm I have (3) 1TB SATA drives and didn't pay any attention to this
issue. So I have no idea if mine has the jumper or not, and what pin it's
set as default. But as long as they don't give me any problem, then they
should be free to be whatever they chose to be (until next time I add more
SATA drive or their funeral).

Thanks for the info.
 
larry said:
Because some SATA controllers were designed wrong and won't adapt
automatically. According to SomeJoe7777 at Tom's Hardware, they
include:

Via VT8237
Via VT8237R
Via VT6420
Via VT6421L
SIS 760
SIS 964
Intel 82801EB (ICH 5/5R)

I'm not sure about the Intel 82801EB because I have a Dell Optiplex
GX270 with Intel 865G chipset, which I think includes the 82801EB
chip, and I've had no problems using this computer with Samsung,
Hitachi, Seagate, and WD drives configured for 3.0Gb/s. OTOH those
VIA chips definitely won't work at all with them and require SATA
drives be limited to 1.5Gbs, regardless of the driver or BIOS. VIA
gives the excuse that those chips are old, but even older 1.5Gb/s SATA
chips from Promise (Marvell), Intel, and I think Silicon Image get
along just fine with 3.0Gb/s drives.
Click to expand...

The affected chipsets were mentioned in a Seagate document. Page 10.
The VT8237S, a later version of the 8237, works fine with jumper
in or out. So VIA (eventually) figured out how to fix it.

http://www.seagate.com/staticfiles/...ndmax20_and_21_installation_guide_sata_en.pdf

Paul
 
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