PRS-T1 Does Rooting effect USB Transfer Speed to MicroSD?

crusherjoe2000 · 12-19-2011, 09:54 AM

When I tried to transfer a file via USB to the MicroSD, I found that the transfer speed is very slow (around 160KB/s). In comparison, when I transfer to the built-in SD I get around 1500KB/sec, which is still slow but more reasonable.

I took out the MicroSD (4Gig Kingston) and ran CrystalDiskMark 3.0.1 using the laptop's SDHC reader and I got around 12.34 MB/Sec read and 7.342 MB/Sec write speed, so the problem is most likely not the MicroSD Card.

My laptop is currently running Windows 7 Pro, and PRS-T1 is running the latest firmware 1.0.03.11140 and the latest minimal-root.zip.

I don't know enough about minimal-root.zip to know if it has replaced something in the kernel or a device driver that may affect the transfer speed. I am very happy with the mod so I really want to keep it.

I did some googling and this is some discussions I found about slow transfer speed in other devices, and I don't know how relevant they are with respect to Sony PRS-T1:

Slow USB Transfer speeds....

which links this discussion.

Can someone with the mod try a file transfer and tell me what kind of speed they are getting?

Thanks for you help
ST

crusherjoe2000 · 12-19-2011, 09:18 PM

Update: I had tried using a different MicroSD card (4G, also Kingston) and with this new card the speed is now between 2 and 3MB/Sec. The strange thing is that on a Samsung Galaxy the transfer speed is the same (around 6MB/Sec) for both card. So for same reason Sony PRS-T1 just doesn't like the other card.

I also tried to restore the system to factory default, and the result is the same, i.e., with the new MicroSD the speed is between 2 and 3 MB/Sec, and for the internal SD the speed is between 1.5 and 2 MB/Sec. So the use of minimal-root.zip is not the cause of the problem.

12-19-2011, 09:54 AM	#1
crusherjoe2000 Junior Member Posts: 6 Karma: 10 Join Date: Dec 2011 Device: Sony PRS-T1	Does Rooting effect USB Transfer Speed to MicroSD? When I tried to transfer a file via USB to the MicroSD, I found that the transfer speed is very slow (around 160KB/s). In comparison, when I transfer to the built-in SD I get around 1500KB/sec, which is still slow but more reasonable. I took out the MicroSD (4Gig Kingston) and ran CrystalDiskMark 3.0.1 using the laptop's SDHC reader and I got around 12.34 MB/Sec read and 7.342 MB/Sec write speed, so the problem is most likely not the MicroSD Card. My laptop is currently running Windows 7 Pro, and PRS-T1 is running the latest firmware 1.0.03.11140 and the latest minimal-root.zip. I don't know enough about minimal-root.zip to know if it has replaced something in the kernel or a device driver that may affect the transfer speed. I am very happy with the mod so I really want to keep it. I did some googling and this is some discussions I found about slow transfer speed in other devices, and I don't know how relevant they are with respect to Sony PRS-T1: Slow USB Transfer speeds.... which links this discussion. Can someone with the mod try a file transfer and tell me what kind of speed they are getting? Thanks for you help ST Last edited by crusherjoe2000; 12-19-2011 at 04:07 PM. Reason: Fix typo

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12-19-2011, 09:18 PM	#2
crusherjoe2000 Junior Member Posts: 6 Karma: 10 Join Date: Dec 2011 Device: Sony PRS-T1	Update: I had tried using a different MicroSD card (4G, also Kingston) and with this new card the speed is now between 2 and 3MB/Sec. The strange thing is that on a Samsung Galaxy the transfer speed is the same (around 6MB/Sec) for both card. So for same reason Sony PRS-T1 just doesn't like the other card. I also tried to restore the system to factory default, and the result is the same, i.e., with the new MicroSD the speed is between 2 and 3 MB/Sec, and for the internal SD the speed is between 1.5 and 2 MB/Sec. So the use of minimal-root.zip is not the cause of the problem.

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