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| Author |
Message |
Guest
|
 Posted: Tue Dec 19, 2006 5:25 am Post subject: Start request unit failed |
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Hi Guys,
Please help.
I am new to SCSI's. I have recently got myself an old server its an
Acer Altos 1100e. I have 5 hot swap SCSI drives in there, 1 x Ultra2
SCSI 18.2 Gb and 4 x Ultra3 SCSI 9.2Gb all running at 10K rpm. There is
an Adaptec AHA-950u2b SCSI interface card. Running with 256 RAM and
Pentium III 800Mhz CPU.
When I first installed the 4 x 9.2Gb drives I used to get "Start
Request Unit Failed" on one of the drives and a week or two later I
started to get the same message for the 18.2Gb drive. When you take the
drives out you can still feel them spinning.
Can someone please explain what "start request unit failed" means and
how can I resolve this? Is it anything to do with termanination of the
SCSI cables? Or are the drives now dead?
Any help would be appriciated. I can provide more information if you
require it. Thanking you guys in advance. |
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Rob Turk
Guest
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| Posted: Tue Dec 19, 2006 4:41 pm Post subject: Re: Start request unit failed |
|
|
<pritesh123@gmail.com> wrote in message
news:1166484307.843630.131810@79g2000cws.googlegroups.com...
| Quote: | Hi Guys,
Please help.
When I first installed the 4 x 9.2Gb drives I used to get "Start
Request Unit Failed" on one of the drives and a week or two later I
started to get the same message for the 18.2Gb drive. When you take the
drives out you can still feel them spinning.
Can someone please explain what "start request unit failed" means and
how can I resolve this? Is it anything to do with termanination of the
SCSI cables? Or are the drives now dead?
|
When drives receive a Start Unit command they spin up (if they aren't spun
up already), and then try to become ready. If there's a problem with the
drive heads or electronics, the drive may be spinning up, but still be
unable to get ready. Get a decent diagnostics program or try the built-in
"Verify" function in the Adaptec BIOS.
Rob |
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Michael Baeuerle
Guest
|
| Posted: Tue Dec 19, 2006 5:14 pm Post subject: Re: Start request unit failed |
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pritesh123@gmail.com wrote:
| Quote: |
I am new to SCSI's. I have recently got myself an old server its an
Acer Altos 1100e. I have 5 hot swap SCSI drives in there, 1 x Ultra2
SCSI 18.2 Gb and 4 x Ultra3 SCSI 9.2Gb all running at 10K rpm. There is
an Adaptec AHA-950u2b SCSI interface card. Running with 256 RAM and
Pentium III 800Mhz CPU.
|
The Acer page:
http://www.acersupport.com/ess/html/1100e_specs.html
specify an "Adaptec Dual Channel Ultra2 SCSI PCI controller".
An AHA-950 seems to no exist. There is an AHA-F950, but that is a Fiber
Channel hostadapter. You probably have an AHA-3950U2.
| Quote: | When I first installed the 4 x 9.2Gb drives I used to get "Start
Request Unit Failed" on one of the drives and a week or two later I
started to get the same message for the 18.2Gb drive. When you take the
drives out you can still feel them spinning.
|
You should not (re)move a spinning disk because the mechanical shocks
can damage it.
| Quote: | Can someone please explain what "start request unit failed" means and
how can I resolve this?
|
"START STOP UNIT" is a SCSI command that can be used by the host to
switch the spindle motor on and off. This message can mean that the
command itself failed or (more likely if the drive is spinning) that the
drive is still not ready after the command as the host expects.
| Quote: | Is it anything to do with termanination of the
SCSI cables?
|
If the other disks on the same bus work: No.
| Quote: | Or are the drives now dead?
|
Maybe. You can try to test the disks with the Adaptec setup tool that
can be startet with Ctrl-A at boot time.
Micha |
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Guest
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| Posted: Tue Dec 19, 2006 8:44 pm Post subject: Re: Start request unit failed |
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|
Rob - can you suggest any good diagnostics programs for the SCSI
drives.
Michael - Sorry it was my type the SCSI incterface card I have is
AHA-3950U2B. I can not find much support for this interface card but
there is some support for the AHA-3950U2 interface card. I will try the
disk tools in the SCSI Bios and give you feedback into what it says. I
did this once and I got a message with codes which I didnt understand
but I will post them once I get it. |
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Guest
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| Posted: Tue Dec 19, 2006 8:44 pm Post subject: Re: Start request unit failed |
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Rob - can you suggest any good diagnostics programs for the SCSI
drives.
Michael - Sorry it was my typo the SCSI incterface card I have is
AHA-3950U2B. I can not find much support for this interface card but
there is some support for the AHA-3950U2 interface card. I will try the
disk tools in the SCSI Bios and give you feedback into what it says. I
did this once and I got a message with codes which I didnt understand
but I will post them once I get it. |
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Folkert Rienstra
Guest
|
| Posted: Tue Dec 19, 2006 8:55 pm Post subject: Re: Start request unit failed |
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"Michael Baeuerle" <michael.baeuerle@stz-e.de> wrote in message news:q5uk54-4gd.ln1@micha.freeshell.org
| Quote: | pritesh123@gmail.com wrote:
I am new to SCSI's. I have recently got myself an old server its an
Acer Altos 1100e. I have 5 hot swap SCSI drives in there, 1 x Ultra2
SCSI 18.2 Gb and 4 x Ultra3 SCSI 9.2Gb all running at 10K rpm. There is
an Adaptec AHA-950u2b SCSI interface card. Running with 256 RAM and
Pentium III 800Mhz CPU.
The Acer page:
http://www.acersupport.com/ess/html/1100e_specs.html
specify an "Adaptec Dual Channel Ultra2 SCSI PCI controller".
An AHA-950 seems to no exist. There is an AHA-F950, but that is a Fiber
Channel hostadapter.
You probably have an AHA-3950U2.
|
There does exist an AHA-3950U2B.
| Quote: |
When I first installed the 4 x 9.2Gb drives I used to get "Start
Request Unit Failed" on one of the drives and a week or two later I
started to get the same message for the 18.2Gb drive. When you take the
drives out you can still feel them spinning.
You should not (re)move a spinning disk because the mechanical shocks
can damage it.
|
Flying heads may well survive shocks better than stationary.
| Quote: |
Can someone please explain what "start request unit failed" means and
how can I resolve this?
"START STOP UNIT" is a SCSI command that can be used by the host to
switch the spindle motor on and off.
|
Not entirely.
| Quote: | This message can mean that the command itself failed
|
That's what it means.
| Quote: | or (more likely if the drive is spinning) that the
drive is still not ready after the command as the host expects.
|
Which is reported in the failure of Start Unit.
| Quote: |
Is it anything to do with termanination of the SCSI cables?
|
"Start Unit Request Failed" indirectly comes from the drive
itself, in it reporting a failure to the Start Unit request.
| Quote: |
If the other disks on the same bus work: No.
|
So no, obviously has nothing to do with other disks working or not.
| Quote: |
Or are the drives now dead?
Maybe.
|
Almost definetely, unless it can be attributed to weak Power.
Since he says the drives are spinning that doesn't appear to
be the case.
| Quote: | You can try to test the disks with the Adaptec setup tool that
can be startet with Ctrl-A at boot time.
|
Fat lot of good will that do you if the drive reports "Start Unit
Request Failed". That's what it will report again.
The sense data that will be accompanied may be interesting though.
|
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Michael Baeuerle
Guest
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| Posted: Tue Dec 19, 2006 11:54 pm Post subject: Re: Start request unit failed |
|
|
Folkert Rienstra wrote:
| Quote: |
Michael Baeuerle wrote:
pritesh123@gmail.com wrote:
[...]
You probably have an AHA-3950U2.
There does exist an AHA-3950U2B.
|
Hmm, I cannot find it. Adaptec lists only the 3950U2 on their INet
pages. If the "B" means the same as in the past, it should be simply a
revised version of the 3950U2.
| Quote: | When I first installed the 4 x 9.2Gb drives I used to get "Start
Request Unit Failed" on one of the drives and a week or two later I
started to get the same message for the 18.2Gb drive. When you take the
drives out you can still feel them spinning.
You should not (re)move a spinning disk because the mechanical shocks
can damage it.
Flying heads may well survive shocks better than stationary.
|
I disagree. If a disk spins, the heads are not parked (but the disk will
park them as soon as the power supply become disconnected). In other
words: The disk will park the heads at the same time as it is
mechanically moved - this is the worst case. If the acceleration is
outside the limits and the heads touch the surface, it can be damaged
over many cylinders. If the disk does not spin, the heads are parked and
already touch the surface (of the landing zone) [1]. This zone contains
no data and cannot be damaged easily. The specifications of some Seagate
disks that I have checked matches this ...
Example Seagate "Cheetah 18LP" (ST318203L):
---------------------------------------------------
SHOCK (G's, 11/2/.5 ms):
operating (Read/Write) __________5
abnormal ________________________10
nonoperating ____________________75/200/100
---------------------------------------------------
The OP use disks of this category. The allowed acceleration is approx.
10times higher in nonoperating mode.
The limits for actual "Laptop" drives are much higher. Example Seagate
"Momentus 5400.3" (ST9160821A):
---------------------------------------------------
SHOCK (G's):
operating (2 ms)_________________350
abnormal ________________________
nonoperating (2/1/.5 ms) ________800/900/400
---------------------------------------------------
The allowed acceleration is again higher in nonoperating mode.
| Quote: | Can someone please explain what "start request unit failed" means and
how can I resolve this?
"START STOP UNIT" is a SCSI command that can be used by the host to
switch the spindle motor on and off.
Not entirely.
This message can mean that the command itself failed
That's what it means.
or (more likely if the drive is spinning) that the
drive is still not ready after the command as the host expects.
Which is reported in the failure of Start Unit.
|
Not in any case. If you have set the "Immed" bit you may get success
immediately but additional "TEST UNIT READY" commands may fail later.
Micha
[1] AFAIK there are only a few SCSI disks from IBM/Hitachi (with glass
media) where the heads should never touch the surface - instead they are
lifted on a ramp for parking. Most if not all other SCSI disks use
aluminium media and a landing zone. |
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PeterD
Guest
|
| Posted: Wed Dec 20, 2006 1:22 am Post subject: Re: Start request unit failed |
|
|
On Tue, 19 Dec 2006 15:55:07 +0100, "Folkert Rienstra"
<see_reply-to@myweb.nl> wrote:
| Quote: | "Michael Baeuerle" <michael.baeuerle@stz-e.de> wrote in message news:q5uk54-4gd.ln1@micha.freeshell.org
pritesh123@gmail.com wrote:
I am new to SCSI's. I have recently got myself an old server its an
Acer Altos 1100e. I have 5 hot swap SCSI drives in there, 1 x Ultra2
SCSI 18.2 Gb and 4 x Ultra3 SCSI 9.2Gb all running at 10K rpm. There is
an Adaptec AHA-950u2b SCSI interface card. Running with 256 RAM and
Pentium III 800Mhz CPU.
The Acer page:
http://www.acersupport.com/ess/html/1100e_specs.html
specify an "Adaptec Dual Channel Ultra2 SCSI PCI controller".
An AHA-950 seems to no exist. There is an AHA-F950, but that is a Fiber
Channel hostadapter.
You probably have an AHA-3950U2.
There does exist an AHA-3950U2B.
|
http://www.acersupport.com/ess/html/1100e_release.html
or
http://developer.novell.com/yes/43225.htm
Then again, Acer and Novell are both probably wrong about what adapter
they use...
>> |
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Folkert Rienstra
Guest
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Guest
|
| Posted: Wed Dec 20, 2006 4:09 am Post subject: Re: Start request unit failed |
|
|
Guys,
I have run the diagnostics from the SCSI BIOS.
Before going into the BIOS this is what i get:
SCSI ID 0 IBM DDYS-T18350M - START UNIT REQUEST
FAILED
SCSI ID 1 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 0
SCSI ID 2 COMPAQ HD0093172L - START UNIT REQUEST
FAILED
SCSI ID 3 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 1
SCSI ID 4 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 2
Then I go into the BIOS and run the diagnostic for the two drives the
FAILED and this is what I get:
For the IBM Drive:
TARGET SCSI ID 0
SCSI CDB SENT: 03 00 00 00 0E 00 70 00 02 00
HOST ADAPTER STATUS: 00h - NO HOST ADAPTER ERROR
TARGET STATUS: 02h - CHECK CONDITION
SENSE KEY: 02h - NOT READY
+ SENSE CODE: 04h
+ SENSE CODE QUALIFIER: 00h
For the COMPAQ Drive:
TARGET SCSI ID 3
SCSI CDB SENT: 03 00 00 00 0E 00 70 00 02 00
HOST ADAPTER STATUS: 00h - NO HOST ADAPTER ERROR
TARGET STATUS: 02h - CHECK CONDITION
SENSE KEY: 02h - NOT READY
+ SENSE CODE: 04h
+ SENSE CODE QUALIFIER: 00h
Does this mean anything to you guys? As it dont mean a thing to me.
Thanking you guys in advance for your help. |
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|
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|
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Folkert Rienstra
Guest
|
| Posted: Wed Dec 20, 2006 4:32 am Post subject: Re: Start request unit failed |
|
|
"Michael Baeuerle" <michael.baeuerle@stz-e.de> wrote in message news:2kll54-h3e.ln1@micha.freeshell.org
| Quote: | Folkert Rienstra wrote:
Michael Baeuerle wrote:
pritesh123@gmail.com wrote:
[...]
You probably have an AHA-3950U2.
There does exist an AHA-3950U2B.
Hmm, I cannot find it. Adaptec lists only the 3950U2 on their INet pages.
If the "B" means the same as in the past, it should be simply a revised
version of the 3950U2.
|
No that makes it an OEM model. OEM versions may differ in connector
topology making it a different model not existing in retail form and/or
having a different PCI ID making them subject to limited OS support
like eg the 19160 vs 29160n and 2930U2 vs 2940U2W.
D 0050 AHA-3950U2 Ultra2 SCSI Controller
D 0050 AHA-3950U2x Ultra2 SCSI Controller
O 9005 AHA-3950U2B Ultra2 SCSI Controller
S F500 AHA-3950U2B Ultra2 SCSI Controller
D 0051 AHA-3950U2x Ultra2 SCSI Controller
O 9005 AHA-3950U2D Ultra2 SCSI Controller
S B500 AHA-3950U2D Ultra2 SCSI Controller
| Quote: |
When I first installed the 4 x 9.2Gb drives I used to get "Start
Request Unit Failed" on one of the drives and a week or two later I
started to get the same message for the 18.2Gb drive. When you take
the drives out you can still feel them spinning.
You should not (re)move a spinning disk because the mechanical shocks
can damage it.
Flying heads may well survive shocks better than stationary.
I disagree. If a disk spins, the heads are not parked (but the disk
will park them as soon as the power supply become disconnected).
|
No one said anything about power disconnected.
| Quote: | In other words: The disk will park the heads at the same time as it is
mechanically moved - this is the worst case. If the acceleration is
outside the limits and the heads touch the surface, it can be damaged
over many cylinders. If the disk does not spin, the heads are parked
and already touch the surface (of the landing zone)
|
If the heads are parked you still can get head slap.
| Quote: | [1]. This zone contains no data and cannot be damaged easily.
|
Wait for the platters to spin counter clockwise and see what happens.
| Quote: | The specifications of some Seagate disks that I have checked matches this ...
Example Seagate "Cheetah 18LP" (ST318203L):
---------------------------------------------------
SHOCK (G's, 11/2/.5 ms):
operating (Read/Write) __________5
abnormal ________________________10
nonoperating ____________________75/200/100
---------------------------------------------------
The OP use disks of this category. The allowed acceleration is approx.
10 times higher in nonoperating mode.
The limits for actual "Laptop" drives are much higher. Example Seagate
"Momentus 5400.3" (ST9160821A):
---------------------------------------------------
SHOCK (G's):
operating (2 ms)_________________350
abnormal ________________________
nonoperating (2/1/.5 ms) ________800/900/400
---------------------------------------------------
The allowed acceleration is again higher in nonoperating mode.
|
Acceleration, presumably as in fall.
I was more thinking of sideways motion. And apparently, so were you.
| Quote: |
Can someone please explain what "start request unit failed" means and
how can I resolve this?
"START STOP UNIT" is a SCSI command that can be used by the host to
switch the spindle motor on and off.
Not entirely.
This message can mean that the command itself failed
That's what it means.
or (more likely if the drive is spinning) that the
drive is still not ready after the command as the host expects.
Which is reported in the failure of Start Unit.
Not in any case. If you have set the "Immed" bit you may get success
immediately but additional "TEST UNIT READY" commands may fail later.
Micha
[1] AFAIK there are only a few SCSI disks from IBM/Hitachi (with glass
media) where the heads should never touch the surface
|
Not just SCSI, all of them.
| Quote: | - instead they are lifted on a ramp for parking.
|
And if you look here you'll find a fair number of Seagate drives that
use them too: http://www.seagate.com/newsinfo/newsroom/photo/
Btw, glass media are also used in microdrives.
| Quote: | Most if not all other SCSI disks use aluminium media and a landing zone.
|
Some do, some don't:
http://www.seagate.com/content/newsinfo/images/downloads/Seagate_Cheetah_15K-4.jpg
http://www.seagate.com/content/newsinfo/images/downloads/Seagate_Cheetah_10K-7.jpg
http://www.seagate.com/newsinfo/images/downloads/Cuda_7200_9_SATA_500GB.jpg |
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Folkert Rienstra
Guest
|
| Posted: Wed Dec 20, 2006 6:00 am Post subject: Re: Start request unit failed |
|
|
<pritesh123@gmail.com> wrote in message news:1166571310.939069.4830@a3g2000cwd.googlegroups.com
| Quote: | Guys,
I have run the diagnostics from the SCSI BIOS.
Before going into the BIOS this is what i get:
SCSI ID 0 IBM DDYS-T18350M - START UNIT REQUEST FAILED
SCSI ID 1 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 0
SCSI ID 2 COMPAQ HD0093172L - START UNIT REQUEST FAILED
SCSI ID 3 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 1
SCSI ID 4 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 2
Then I go into the BIOS and run the diagnostic for the two drives the
FAILED and this is what I get:
For the IBM Drive:
TARGET SCSI ID 0
SCSI CDB SENT: 03 00 00 00 0E 00 70 00 02 00
HOST ADAPTER STATUS: 00h - NO HOST ADAPTER ERROR
TARGET STATUS: 02h - CHECK CONDITION
SENSE KEY: 02h - NOT READY
+ SENSE CODE: 04h
+ SENSE CODE QUALIFIER: 00h
For the COMPAQ Drive:
TARGET SCSI ID 3
SCSI CDB SENT: 03 00 00 00 0E 00 70 00 02 00
HOST ADAPTER STATUS: 00h - NO HOST ADAPTER ERROR
TARGET STATUS: 02h - CHECK CONDITION
SENSE KEY: 02h - NOT READY
+ SENSE CODE: 04h
+ SENSE CODE QUALIFIER: 00h
Does this mean anything to you guys?
|
Yep: http://www.t10.org/lists/asc-num.htm#ASC_04
04/00 LOGICAL UNIT NOT READY, CAUSE NOT REPORTABLE
Usually that means it's dead as a doornail.
| Quote: | As it dont mean a thing to me.
Thanking you guys in advance for your help. |
|
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Rob Turk
Guest
|
| Posted: Wed Dec 20, 2006 1:03 pm Post subject: Re: Start request unit failed |
|
|
<pritesh123@gmail.com> wrote in message
news:1166571310.939069.4830@a3g2000cwd.googlegroups.com...
| Quote: | Guys,
I have run the diagnostics from the SCSI BIOS.
Before going into the BIOS this is what i get:
SCSI ID 0 IBM DDYS-T18350M - START UNIT REQUEST
FAILED
SCSI ID 1 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 0
SCSI ID 2 COMPAQ HD0093172L - START UNIT REQUEST
FAILED
SCSI ID 3 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 1
SCSI ID 4 COMPAQ HD0093172L ULTRA2-SE - HARD DRIVE 2
Then I go into the BIOS and run the diagnostic for the two drives the
FAILED and this is what I get:
For the IBM Drive:
TARGET SCSI ID 0
SCSI CDB SENT: 03 00 00 00 0E 00 70 00 02 00
HOST ADAPTER STATUS: 00h - NO HOST ADAPTER ERROR
TARGET STATUS: 02h - CHECK CONDITION
SENSE KEY: 02h - NOT READY
+ SENSE CODE: 04h
+ SENSE CODE QUALIFIER: 00h
For the COMPAQ Drive:
TARGET SCSI ID 3
SCSI CDB SENT: 03 00 00 00 0E 00 70 00 02 00
HOST ADAPTER STATUS: 00h - NO HOST ADAPTER ERROR
TARGET STATUS: 02h - CHECK CONDITION
SENSE KEY: 02h - NOT READY
+ SENSE CODE: 04h
+ SENSE CODE QUALIFIER: 00h
Does this mean anything to you guys? As it dont mean a thing to me.
Thanking you guys in advance for your help.
|
Two dead drives, or maybe, just maybe, two bad power connectors? When a
drive starts up it draws more power than any other time during operation.
When you have a bad power connection, the power at the drive logic may dip
below a safety treshold and the drive may reset to power-down state.
Rob |
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Rob Turk
Guest
|
| Posted: Wed Dec 20, 2006 1:46 pm Post subject: Re: Start request unit failed |
|
|
<pritesh123@gmail.com> wrote in message
news:1166604829.304800.20570@i12g2000cwa.googlegroups.com...
| Quote: | I have tried to the two drive in to completely different slots by
swaping 4 of my 5 drive around and I still get the same error. Is it
possible to open up the drive and getting it working or is that too far
streched?
The change of recovering them by opening them up are none. There's nothing |
inside that you can 'fix'.
Rob |
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Guest
|
| Posted: Wed Dec 20, 2006 1:46 pm Post subject: Re: Start request unit failed |
|
|
I have tried to the two drive in to completely different slots by
swaping 4 of my 5 drive around and I still get the same error. Is it
possible to open up the drive and getting it working or is that too far
streched? |
|
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|
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