Panasonic SW-9581 DVD Writer

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What is the DVD Write speeds? CAV, CLV, PCAV, ZCLV. Read our DVD Writer colum explanation.

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Panasonic SW-9581

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$250 7.3/10
9 votes
Read 11


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DVD Media comments for this DVD Writer (click on the link to read the comments):
1 TDK 2xDVD-R (TDKG010000d9) comments, 1 good, 0 mixed, 0 poor.
1 That's Write! 4xDVD-R (LEADDATA01..) comments, 1 good, 0 mixed, 0 poor.
1 That's Write! 4xDVD-R (PRINCO......) comments, 1 good, 0 mixed, 0 poor.
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11 comments, Showing 1 to 11 comments

What disks it understands???
Why it does not understand new DVD-RW ver.1.2???
How to force it to write on DVD+R?
панасоник - лажа

Comments posted by Riki Chang from Russian Federation, August 29, 2009. Rated this writer 1 of 10.

Great little drive, not the fastest on the block but if you're willing to put up with 2x DVD-R then it's a sturdy little performer.

I've written 25 NanYa DVD-R @ 2x without a single coaster, I also regularly use Traxdata DVD-RW media again without a hitch but at the rather slow 1x speed.

Frustrated with the 1x DVD-RW writing I decided to get hold of some DVD-RAM discs. These work great although the write speed is not nearly as quick as the 2x suggested its an improvement on the 1x DVD-RW.

A word of warning however, Windows XP supports DVD-RAM natively but it only supports FAT32 formatted discs so you will only be able to put 4Gb onto XP formatted discs. Install the UDF drivers and you'll be able to write the full 4.23Gb capacity.

Comments posted by Jason Arthurs from Other, January 05, 2004. Rated this writer 10 of 10.

please could someone tell me which dvd-r work on this model im having alot of problems writing to disks.cannot find any that work 100%.someone tell me a reliable dvd-r media that works with my sw-9581.ive tried - mirror , bulkpaq , and high quality printable getting alot of write errors,like- power calibration error.

Comments posted by andy jones from Other, October 14, 2003. Rated this writer No rating.

Very pleased with this drive and have been using it for several months. Only wish that I could have grabbed one at £70.... what a bargain!

I have been using Mirror DVD-RAM and Nan-Ya (1x-2x) DVD-R with virtually no probs, only about 5 of 75+ DVD-R disks have failed.

Agreed about the support though, pretty poor from Panasonic.

Comments posted by Shotsfan from Other, September 30, 2003. Rated this writer 8 of 10.

got it for just over £70+p&p from scan, had to update the firmware first as recomended.
backed-up a few films very well with dvd-r, zero defex 1x pure purple and verbatim 2x and traxdata 2x and all went well, used zdefex x4 xtreme purple, datawrite classic, intenso(general)and although they wrote o.k, i could not get back or access much of the data on them, when i needed to???.
cd-r, own brand would not write at all so beware???.
all 1x dvd-r, after firmware update seem to write at 2x.
have not yet tried dvd-rw or dvd-ram so cannot comment.
it's a nice dvd-writer though, much better than my now not used nec-nd100 dvd+r and cost me alot less.

Comments posted by Sir Philip from Other, September 20, 2003. Rated this writer 8 of 10.

Datawrite Classic 4x DVD-R poor quality after the first 3.5Gb.
Datawrite 1x-2x DVD-RW similarly poor.
TDK DVD-R excellent.
Traxdata 2x DVD-R excellent (0.99 GBP at SVP).
Packard Bell DVD-RW excellent.

Comments posted by Steve Wadsworth from Other, September 14, 2003. Rated this writer 8 of 10.

if u have not yet got the update, B102 firmware go here
for more info or try link at bottom of page.

the sw-9581-c, seems to be a nice drive and seems to work with lots of different media, that is more than i can say for my nec-1100.
and cheap at the price (£65 + vat + £7 carriage)(from scan)now the 4x's are out.

Comments posted by phil from Other, July 28, 2003. Rated this writer 8 of 10.

Pretty happy with this drive - other than the fact it's white and I have a black case...

Bought it for £71 (YES - seventy one) from, plus £7 for delivery.

Had to upgrade to the latest B102 firmware (available here before I could get any DVD's I'd burnt to work with any of my DVD players - including Panasonic's DMR-E30 - which questions Panasonics original firmware...

Now I just need to figure out how to extract DVD-RAM material to burn out onto DVD-R

Comments posted by Joe from Other, July 05, 2003. Rated this writer 7 of 10.

I really like this drive, I've updated the firmware to version B102 and now it burns very good on 2x, with the first firmware I had some problems in standalone players.

Comments posted by SanderO from Other, May 28, 2003. Rated this writer 7 of 10.

There are XP drivers and tools on

The SW9581 seems to be the OEM, for this type Panasonic

Comments posted by Jeroen from Other, May 27, 2003. Rated this writer No rating.

I have this burner for some weeks now. Works as advertised.It burns most 1x media at 2x. So far i had only problems with the Windows XP CD burn wizzard, interfering with DVD-ram functionality. I would have given it a 10 if Panasonic would provide better support for the drive.

The drive is a tray-loader, so you have to take DVD-RAM disks out of their case!

Comments posted by elpedro from Other, May 27, 2003. Rated this writer 9 of 10.

11 comments, Showing 1 to 11 comments

1 DVD Writer hits, Showing 1 to 1 DVD Writers
Column Explanation:

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New comments= New comments since your last visit.
New Writer = New DVD Writer since your last vist.

Original Equipment Manufacturer.


The manufacturer of the main chipset the DVD writer/recorder is based on.

Write support / Read support
= Works
DVD-R = Is not supported
DVD-R? = Not tested

Single Layer(4.7GB) write speeds
1x (CLV) = about 58 minutes
2x (CLV) = about 29 minutes
2.4x (CLV) = about 24 minutes
4x (CLV) = about 14.5 minutes
6x (CLV/ZCLV) = about 10-12 minutes
8x (PCAV/ZCLV) = about 8-10 minutes
12x (PCAV/ZCLV) = about 6.5-7.5 minutes
16x (CAV/ZCLV) = about 6-7 minutes

Dual/Double Layer(8.5GB) write speeds
1x CLV = about 105 minutes
2.4x CLV = about 44 minutes
4x CLV = about 27 minutes

Single Layer (4.7GB) read speeds
1x read speed is 1.321MB/s = ~56 minutes
6x CAV (avg. ~4x) read speed is max 7.93MB/s = ~14 minutes
8x CAV (avg. ~6x) read speed is max 10.57MB/s = ~10 minutes
12x CAV (avg. ~8x) read speed is max 15.85MB/s = ~7 minutes
16x CAV (avg. ~12x) read speed is max 21.13MB/s = ~5 minutes

DVD Write types
CAV = Constant Angular Velocity, the DVD is written at a constantly increasing speed.
CLV = Constant Linear Velocity, the DVD is written at a constant speed.
ZCLV = Zone Constant Linear Velocity, the DVD is divided into zones. After each zone the write speed is increased.
PCAV = Partial Constant Angular Velocity, the DVD is being written at an increasing speed until a certain speed. After this speed it will not increase anymore.

Desktop = Standalone desktop DVD Recorder
EIDE = Computer DVD Writer with EIDE/IDE connection
SCSI = Computer DVD Writer with SCSI connection
USB = Computer desktop DVD Writer with USB 2.0 or/and 1.1 connection
FireWire = Computer desktop DVD Writer with IEEE 1394/FireWire/i.Link connection (some standalone desktop dvd recorder supports this also but then it is usually to connect your DV camera to the recorder)

The first rating is based on a weighted rank (the true Bayesian), it requires at least 5 votes to get a weighted rating.
The second rating between the ( ) is a normal average rating.

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