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SubjectRe: [PATCH] sata_promise: Port enumeration order - SATA 150 TX4, SATA 300 TX4

Fabian Knittel wrote:

>In other words: The boards appear to be wired correctly (or maybe just
>uniformly the wrong way) and the bios, the windows driver and the closed
>source promise driver (reportedly) know how to handle it.
>We have a SATA 150 TX4 board with the same behaviour and would love to
>see this annoying little bug fixed in linux. :)
> Fabian
>Christiaan den Besten wrote:
>>We have several of these boards in use [SATA 300 TX4] (bought over time
>>.. not in one batch). All of them have the ordering as described below.
>>So another vote for "Please fix!" :)
>>>Milan Kupcevic wrote:
>>>>From: Milan Kupcevic <>
>>>>Fix Promise SATAII 150 TX4 (PDC40518) and Promise SATA 300 TX4
>>>>(PDC40718-GP) wrong port enumeration order that makes it (nearly)
>>>>impossible to deal with boot problems using two or more drives.
>>>>Signed-off-by: Milan Kupcevic <>
>>>>The current kernel driver assumes:
>>>>port 1 - scsi3
>>>>port 2 - scsi1
>>>>port 3 - scsi0
>>>>port 4 - scsi2
>>>I totally agree with the fact that the Linux driver gets the ports wrong
>>>when compared to the BIOS, Windows and surely contradicts the port
>>>numbers printed on the board. I doubt we all got samples on the one
>>>bad batch...
>>>It *is* a real problem and if the solution is correct then I support it.
>>>Maybe we need a quick feedback from current users: do you guys find
>>>that the ports are detected as they are labelled (white silk screen)
>>>on the board or do they show up out of order (as listed above by

This is a list of Promise SATA TX4 and FastTrak TX4xxx controllers, I
have in my lab, affected with the "wiring" bug:

Retail name: SATAII150 TX4
Chip label: PDC40518 SATAII150
Vendor-Device number: 105a:3d18 (rev 02)
Wiring: NEW

Retail name: FastTrak TX4200
Chip label: PDC40519 RAID SATAII150
Vendor-Device number: 105a:3519
Wiring: NEW

Retail name: SATA300 TX4
Chip label: PDC40718-GP SATAII300
Vendor-Device number: 105a:3d17 (rev 02)
Wiring: NEW

This is the only one Promise TX4 controller, I have in my lab, that is
working properly regarding the "wiring" bug with the current kernel driver:

Retail name: FastTrak S150 TX4
Chip label: PDC20319 RAID SATA 150
Vendor-Device number: 105a:3319 (rev 02)
Wiring: OLD

This is a list of Promise SATA TX2 and FastTrak TX2xxx controllers, I
have in my lab, that are working correctly regarding the "wiring" bug
with the current kernel driver:

Retail name: FastTrak S150 TX2plus
Chip label: PDC20371 SATA 150
Vendor-Device number: 105a:3371 (rev 02)

Retail name: SATA150 TX2plus
Chip label: PDC20375 SATA 150
Vendor-Device number: 105a:3375 (rev 02)

Retail name: FastTrak TX2200
Chip label: PDC20571 SATAII150
Vendor-Device number: 105a:3571 (rev 02)

It seems the problem exists on all newer Promise SATA TX4 and FastTrak
TX4xxx controllers, so I refer to them as the "new wiring" Promise SATA
controllers. All the Promise SATA TX2 and FastTrak TX2xxx I have in my
lab are working correctly with the current kernel driver, so it seems
this "wiring" problem does not affect the TX2(xxx) controllers; only
SATA TX4 and FastTrak TX4xxx are affected.

For driver to be able to distinguish the "new wiring" and the "old
wiring" Promise TX4(xxx) controllers we need a feedback from the users
that are aware of this problem.

Q. How to know if a controller has the "new wiring"?
A. You need to be able to boot your testing machine using a hard drive
not attached to the controller you are going to test. Connect 4
different size/brand/model SATA hard drives to the testing controller so
you can see the particular order they are recognized by the BIOS and by
the kernel (not patched for the "new wiring").
Boot the machine and look for the BIOS recognized hard drive order.
The BIOS recognized hard drive order always matches the order the hard
drives are connected to, with respect to port number labels. If you are
testing FastTrak TX series controller you may need to press Ctrl-F (or
Ctrl-A) to get into controllers' BIOS and then press "2" to see the BIOS
recognized order. Plain SATA models do not have controller specific
BIOS and they will report the BIOS recognized order without user
intervention. You may want to press the "Pause" key on your keyboard to
have enough time to read the text on the screen. If you are arguing
with your machine using a serial terminal, there is a Hold Screen button
somewhere on the terminal keyboard.
When the machine boots up, type "cat /proc/scsi/scsi", it will show
up the order hard drives are recognized by the kernel. Make sure the
kernel you are using is NOT patched for the "new wiring" bug. If you
have the "new wiring" case, the order will be 3-2-4-1; that means, the
drive connected to the "port 3" and recognized as the third drive
connected to the controller by the BIOS, will be seen by the kernel as
first hard drive connected to this controller. The second drive is
always at second place, the fourth one goes at third place and the first
one goes at fourth place.

Please respond with this data:

- Your Promise SATA controller retail name
- Chip label (PDCxxxxx)
- PCI vendor and device code as you can get with "lspci -n"
- Say if the controler has the new or the old wiring

Your feedback will be appreciated.

NOTE: the patch I have submitted ( ) is a
solution that doesn't know about the older Promise SATA controllers,
which are not affected with the "new wiring" problem, so the older
controllers will appear screwed if you use it.

Hopefully we will collect enough info about all the SATA Promise
controllers to distinguish the new and the old wiring controllers, then
produce a new patch that will be a correct solution to the "new wiring"

The best to all,


Milan Kupcevic
System Administrator
Harvard University
Department of Physics

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