Will new buffer underrun feature also work during Verify stage ?

[Defenestration]

Hi LUK,

 

I trust you've had a good weekend so far.

 

Will the new buffer underrun feature (ie. if buffer empties during burn, don't resume burn until buffer is full and Avg Disk Queue Length is 1) also work during the Verify Stage ?

 

I know it won't improve the burn quality, but the verify stage can also be very disk intensive and so this feature would come in handy to stop disk thrashing when other apps are making heavy use of the disk. The other benefit is that it may also speed up the verify stage during this scenario.

[volvofl10]

am i right in thinking your using a laptop most of the time ?

[LIGHTNING UK!]

No it won't

[Defenestration]

am i right in thinking your using a laptop most of the time ?

You guessed right

 

Compared to a 3.5" desktop HD, a laptop HD drive (even though it's 7200rpm) seems to struggle a bit when doing a few things at once (shame my system doesn't multi-task as well as me )

[volvofl10]

your really going to have to consider doing all your "resource hungry" stuff on a desktop set up . despite all the claims that notebooks/laptops are desk replacements , this statement is FAR from true , believe me, ive been on laptops for 10 years now and STILL cant find one that matches a desktop spec/speed for spec/speed.

 

moreover , burners in laptops have never been up to the specs there described as having , they all seem to exagerate there speeds in the adverts.

do you have any external drives you can connect to your laptop by usb2 or firewire ?? these will operate MUCH more efficiently than internal ones . my internal burner will only write dvd at 4x max, and cd at 28x before they fail , whereas my external firewire ones will go dvd at 8x constant and cd at 48x

[spinningwheel]

[volvofl10]

Just for the sheer fun of it ( and the fact the Italy v France game was boring till zinadane took to street fighting) , i tried a few burns and linked an external hdd and an external burner up, but i daisy chained them a differant way to normal with firewire .

the point of the excercise is to show how poor a laptops performance really is with buffer levels, due to internal components and speeds of those components

normally the device buffer and buffer play happily around the 80-100% marks

having connected them in a differant sequence to usual, i managed to get the buffers to TOTALLY empty on 2 consequtive burns, HOWEVER , the external burner ( an old LG4120b) still managed to complete the burn without stopping, using burnproof feature in IB .

the ;aptop was connected to the external writer by mini firewire to firewire, then the source hdd was connected to the writer by daisychain 6 pin to 6 pin firewire cable. In effect, this is producing a restricted I/O operation , hence the low buffer levels.

laptop used was a P4 2.2 with 1gig ram .external hdd rpm is 7200 , this "should" have been capable of overcoming the I/O restriction i forced on it

 

the following log is for 2 burns of a 4.35gb test ISO .

notice the parts ive highlighted in red , showing the min and average burn speeds , for all the burns i watched the 2 buffers dancing up and down between 0% and 100% and at several times , BOTH buffers were empty !!

 

what im trying to point out is that NO MATTER WHAT is altered in ImgBurn , a laptop will never keep up with what IB is capable of with a good desk top set up.Remember, to miniaturise is to reduce , and its not the physical size of the PC thats changed ,its the performance of it as well

I 23:27:51 ImgBurn Version *.*.*.* Beta started!

I 23:27:51 Microsoft Windows XP Professional (5.1, Build 2600 : Service Pack 2)

I 23:27:51 Initialising SPTI...

I 23:27:51 Searching for SCSI / ATAPI devices...

I 23:27:52 Found 1 CD-RW, 3 DVD-ROMs and 1 DVD?RW/RAM!

I 23:28:47 Operation Started!

I 23:28:47 Source File: M:\Test files\435gbtestiso.ISO

I 23:28:47 Source File Sectors: 2,285,853 (MODE1/2048)

I 23:28:47 Source File Size: 4,681,426,944 bytes

I 23:28:47 Source File Volume Identifier: 435_GB_TEST_ISO

I 23:28:47 Source File Implementation Identifier: DVD Shrink

I 23:28:47 Source File File System(s): ISO9660, UDF (1.02)

I 23:28:47 Destination Device: [0:0:0] HL-DT-ST DVDRAM GSA-4120B A116 (H:) (1394)

I 23:28:47 Destination Media Type: DVD-R (Disc ID: TYG02) (Speeds: 4x, 8x)

I 23:28:47 Destination Media Sectors: 2,298,496

I 23:28:47 Write Mode: DVD

I 23:28:47 Write Type: DAO

I 23:28:47 Write Speed: MAX

I 23:28:47 Link Size: Auto

I 23:28:47 Test Mode: No

I 23:28:47 BURN-Proof: Enabled

I 23:28:47 Filling Buffer...

I 23:28:47 Writing LeadIn...

I 23:29:20 Writing Image...

I 23:40:48 Synchronising Cache...

I 23:40:54 Image MD5: 9a0e7f222b5e5509ec8dc6a9f286a014

I 23:40:54 Operation Successfully Completed! - Duration: 00:12:07

I 23:40:54 Average Write Rate: 6,644 KB/s (4.8x) - Maximum Write Rate: 11,250 KB/s (8.1x)

I 23:41:27 Operation Started!

I 23:41:27 Source File: M:\Test files\435gbtestiso.ISO

I 23:41:27 Source File Sectors: 2,285,853 (MODE1/2048)

I 23:41:27 Source File Size: 4,681,426,944 bytes

I 23:41:27 Source File Volume Identifier: 435_GB_TEST_ISO

I 23:41:27 Source File Implementation Identifier: DVD Shrink

I 23:41:27 Source File File System(s): ISO9660, UDF (1.02)

I 23:41:27 Destination Device: [0:0:0] HL-DT-ST DVDRAM GSA-4120B A116 (H:) (1394)

I 23:41:27 Destination Media Type: DVD-R (Disc ID: TYG02) (Speeds: 4x, 8x)

I 23:41:27 Destination Media Sectors: 2,298,496

I 23:41:27 Write Mode: DVD

I 23:41:27 Write Type: DAO

I 23:41:27 Write Speed: MAX

I 23:41:27 Link Size: Auto

I 23:41:27 Test Mode: No

I 23:41:27 BURN-Proof: Enabled

I 23:41:28 Filling Buffer...

I 23:41:29 Writing LeadIn...

I 23:42:01 Writing Image...

I 23:54:03 Synchronising Cache...

I 23:54:09 Image MD5: 9a0e7f222b5e5509ec8dc6a9f286a014

I 23:54:10 Operation Successfully Completed! - Duration: 00:12:42

I 23:54:10 Average Write Rate: 6,332 KB/s (4.6x) - Maximum Write Rate: 11,119 KB/s (8.0x)

 

im afraid the only way you will get Fast/er burns without buffer underuns is to change to a desktop set up