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Potential 'WaitImmediateIO' Deferred Error - Logical Unit Failure


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ISO image created and written by the guide at http://home.tiscali.be/debie.roland/pgcedi...ith_pgcedit.htm

Latest versions of PGCedit, mkisofs and ImgBurn



I 23:22:17 Filling Buffer...

I 23:22:19 Writing LeadIn...

I 23:23:03 Writing Image...

I 23:23:03 Writing Layer 0... (LBA: 0 - 2031503)

I 23:35:33 Writing Layer 1... (LBA: 2031504 - 4063003)

I 23:48:06 Synchronising Cache...

I 23:48:10 Closing Track...

W 23:48:11 Potential 'WaitImmediateIO' Deferred Error - Logical Unit Failure

I 23:48:25 Finalising Disc...

W 23:48:26 Potential 'WaitImmediateIO' Deferred Error - Logical Unit Failure

E 23:49:23 Finalise Disc Failed! - Reason: Write Protected

I 23:49:24 Operation Successfully Completed! - Duration: 00:27:06

I 23:49:24 Average Write Rate: 5,406 KB/s (3.9x) - Maximum Write Rate: 6,577 KB/s (4.7x)



Everything seems to be OK, verify is OK, too.

Played OK...


This error reproduced every time, at 2.4x too... What this error mean?


Add.info: this DVD-RW device is accessed via iSCSI, never produced any errors

Edited by CecoM
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Ignore the 'write protected' bit... that's my problem due to some bad memory copying on my part.


The other two are yours though I'm afraid.


The drive is reporting errors while it's off doing its own thing - in this case, closing the track and finalising the disc.


ImgBurn simply issues those commands and then polls the drive to check it's status. The drive is then reporting those errors in the data it replies with.


This could well be a problem with iSCSI.

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  • 2 weeks later...

I'm still getting this error too, it is very frustrating. Yet the disc seems to be fine and the movie is all there.


I 04:06:08 ImgBurn Version started!

I 04:06:08 Microsoft Windows XP Professional (5.1, Build 2600 : Service Pack 2)

I 04:06:08 Initialising SPTI...

I 04:06:08 Searching for SCSI / ATAPI devices...

I 04:06:27 Found 1 DVD?RW and 1 DVD?RW/RAM!

I 04:07:04 Operation Started!

I 04:07:04 Source File: F:\Documents and Settings\Billy\My Documents\New Folder (6)\DVDVolume.ISO

I 04:07:04 Source File Sectors: 2,167,184 (MODE1/2048)

I 04:07:04 Source File Size: 4,438,392,832 bytes

I 04:07:04 Source File Volume Identifier: DVDVolume

I 04:07:04 Source File Implementation Identifier: DVD Producer 1.0

I 04:07:04 Source File UDF Revision: 1.02

I 04:07:04 Destination Device: [1:1:0] BENQ DVD DC DQ60 MREC (E:) (ATA)

I 04:07:04 Destination Media Type: DVD-R (Disc ID: TYG02) (Speeds: 2x, 4x, 8x)

I 04:07:04 Destination Media Sectors: 2,297,888

I 04:07:04 Write Mode: DVD

I 04:07:04 Write Type: DAO

I 04:07:04 Write Speed: 4x

I 04:07:04 Link Size: Auto

I 04:07:04 Test Mode: No

I 04:07:04 BURN-Proof: Enabled

I 04:07:04 Filling Buffer...

I 04:07:05 Writing LeadIn...

I 04:07:25 Writing Image...

I 04:21:02 Synchronising Cache...

W 04:21:47 Potential 'WaitImmediateIO' Deferred Error - Power On, Reset, or Bus Device Reset Occurred


Is this a bug that needs to be fixed with Imgburn. My drive is brand new, has the current firmware and I'm using genuine Taeyo Yuden blanks. The only thing left to do is cry and bang my head against the wall. I've never had so many errors like I do now, ever since the new release of Imgburn. :/

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The old versions never checked for errors during the sync cache / close track commands.


So they've probably always been there, just you're only seeing them now.


As all of the burns in the drives and media forum were done with this version, I think it's safe to say the initial errors are not bugs in the program (as we never once had an error).


That error is worrying though (for you), as it implies the device timed out doing something and so the driver has reset the bus. That's never good!


If you don't mind, next time you burn a disc, press F8 before doing so.


Then save + upload the entire log when the burn finishes. That would tell me a lot more about what's going on.

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Hmm that's a very random error report!


As you can read for yourself, it's quite happy responding to the 'test unit ready' command with the correct 'Logical Unit not ready, Operation in progress' sense data for 4 seconds or so, then it just randomly returns 'Power On, Reset, or Bus Device Reset Occurred' sense data.

As the drive IS responding to commands, I cannot see why it / the I/O subsystem thinks it has timed out. Not only that, a bus reset would normally mean a slight pause in I/O request. The log shows one was sent straight after the one that failed, and it was processed that same second and returned the correct status.


So quite why your machine is behaving in that way is beyond me I'm afraid. Maybe you've got a faulty filter driver installed somewhere along the line and it's giving out bogus status data. Or maybe the BenQ firmware is at fault... who knows.


I can only rely on the info my program receives. If I receive errors, I report errors. Simple as that.

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  • 1 month later...

AT LEAST!!! I found the solution, i found the problem.


1. NEVER ATTACH DVD-RW (ATAPI) on ATA-RAID controller - possible errors at 8GB size.

2. SIMILAR dont attach SCSI tape drive on SCSI-RAID controller - 8GB limit and/or write-only.

3. AT THE END - ImgBurn works fine with DVD-RW attached via software iSCSI client/server.

Edited by CecoM
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