Pocketbook 360 slow: larger library on SD

crangirl · 11-07-2011, 05:16 AM

Hi,

I've been using the Pocketbook 360 for a while now.. and I decided to put more books (most of them are epub, some pdf) on my 8GB SD-card.. (which I've been using since I bought PB360).

Is it normal for the 360 to slow down (a lot) when browsing or (especially) when 'searching' for books (by typing part of the name)?
Or is there any way to speed this up? (Sometimes it's too slow.. and I have to reboot). Different firmware? Using Calibre instead of the File system../by hand. Or is this normal ..?

I tried deviding the large groups of books into smaller groups/folders.. but this didn't really help.

Reading ebooks didn't slow down btw ('flipping of pages').

Thank you in advance,
crangirl

Billi · 11-07-2011, 06:32 AM

I don't own a 360, so take my question with some caveat: Do you use your Pocketbook in library mode or in folder mode? Folder mode should be better to handle large collections.

And are you often adding and deleting books? Than it may be that there are some "rests" in the internal database and you could try cleaning the library (don't know if this function exists on your reader and how it is named). But this will delete all book links like last page read and so on too.

fjtorres · 11-07-2011, 07:37 AM

The PB360 doesn't have a library mode, just folders (and favorites).
Yes, searches do get slower as the number of books grows, because it looks at the entire folder structure before reporting.

askyn · 11-07-2011, 11:59 AM

there is one other possiblity, if you have added / deleted / added books its entierly possible that your SD card needs to be defragmented.

Just like any other storage device you could have fragmented files.

crangirl · 11-08-2011, 08:33 AM

I'll try to defragment it later.. hope it works.

j.p.s · 11-08-2011, 03:17 PM

Quote:

Originally Posted by askyn

there is one other possiblity, if you have added / deleted / added books its entierly possible that your SD card needs to be defragmented.

Just like any other storage device you could have fragmented files.

Flash memory is not "just like any other storage device". Most SD cards use wear leveling to remap sections of updated files to other locations without any visibility to the filesystem level. Defragmenting operations on such devices increases fragmentation. Flash memory does not have the seeking latency of rotating media, which is what defragmenting tries to address.

crangirl · 11-09-2011, 10:07 AM

O.. ok. I haven't defragmented it yet.

frostschutz · 11-09-2011, 12:07 PM

Quote:

Originally Posted by j.p.s

Most SD cards use wear leveling to remap sections of updated files to other locations without any visibility to the filesystem level.

Wear leveling requires a rather complicated logic, SSDs do that with their built in controller chips, but SD cards don't have such a thing - SD cards are just cheap and dumb storage devices really.

Even so fragmentation is unlikely to be an issue.

Very few people have thousands of ebooks. Most ereaders are not optimized to handle huge libraries gracefully. Personally I only put the books I actually read on the device, so while the entire Gutenberg / public domain collection is nice to have, it'd probably just get in the way on the reader...

j.p.s · 11-09-2011, 04:22 PM

Quote:

Originally Posted by frostschutz

Wear leveling requires a rather complicated logic, SSDs do that with their built in controller chips, but SD cards don't have such a thing - SD cards are just cheap and dumb storage devices really.

From "SanDisk Secure Digital Card"
Product Manual
Version 1.9
Document No. 80-13-00169
December 2003

Quote:

1.5.5. Wear Leveling
Wear-leveling is an intrinsic part of the Erase Pooling functionality of SD using NAND memory.

IndecisiveMe · 11-14-2011, 07:13 AM

When you say you've put more books on it, how many are we talking about? I have over 2000 books (they're actually HMTL files, but are as large as books) and I've never experienced it being what I'd call slow, and I'm incredibly impatient.

Having said that, I have my folders organised in such a way that I rarely have to use the search feature. On the few occasions I have used it, it has not been slow at all.

I hope you figure out your problem soon.

Another thought, do you have a high class card? Different cards read at different speeds. I've got a Class 4, 4gb card (can't remember the brand at the minute).

11-07-2011, 05:16 AM	#1
crangirl Connoisseur Posts: 52 Karma: 128 Join Date: May 2010 Device: Pocketbook 360	Pocketbook 360 slow: larger library on SD Hi, I've been using the Pocketbook 360 for a while now.. and I decided to put more books (most of them are epub, some pdf) on my 8GB SD-card.. (which I've been using since I bought PB360). Is it normal for the 360 to slow down (a lot) when browsing or (especially) when 'searching' for books (by typing part of the name)? Or is there any way to speed this up? (Sometimes it's too slow.. and I have to reboot). Different firmware? Using Calibre instead of the File system../by hand. Or is this normal ..? I tried deviding the large groups of books into smaller groups/folders.. but this didn't really help. Reading ebooks didn't slow down btw ('flipping of pages'). Thank you in advance, crangirl Last edited by crangirl; 11-07-2011 at 05:22 AM.

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11-07-2011, 06:32 AM	#2
Billi Wizard Posts: 3,388 Karma: 14190103 Join Date: Jun 2009 Location: Berlin Device: Cybook, iRex, PB, Onyx	I don't own a 360, so take my question with some caveat: Do you use your Pocketbook in library mode or in folder mode? Folder mode should be better to handle large collections. And are you often adding and deleting books? Than it may be that there are some "rests" in the internal database and you could try cleaning the library (don't know if this function exists on your reader and how it is named). But this will delete all book links like last page read and so on too.

11-07-2011, 07:37 AM	#3
fjtorres Grand Sorcerer Posts: 11,732 Karma: 128354696 Join Date: May 2009 Location: 26 kly from Sgr A* Device: T100TA,PW2,PRS-T1,KT,FireHD 8.9,K2, PB360,BeBook One,Axim51v,TC1000	The PB360 doesn't have a library mode, just folders (and favorites). Yes, searches do get slower as the number of books grows, because it looks at the entire folder structure before reporting.

11-07-2011, 11:59 AM	#4
askyn Addict Posts: 300 Karma: 1006538 Join Date: Jul 2008 Device: Kindle Paperwhite (11th Gen)	there is one other possiblity, if you have added / deleted / added books its entierly possible that your SD card needs to be defragmented. Just like any other storage device you could have fragmented files.

11-08-2011, 08:33 AM	#5
crangirl Connoisseur Posts: 52 Karma: 128 Join Date: May 2010 Device: Pocketbook 360	I'll try to defragment it later.. hope it works.

11-09-2011, 10:07 AM	#7
crangirl Connoisseur Posts: 52 Karma: 128 Join Date: May 2010 Device: Pocketbook 360	O.. ok. I haven't defragmented it yet.

11-14-2011, 07:13 AM	#10
IndecisiveMe Addict Posts: 276 Karma: 106 Join Date: Jan 2010 Location: Melbourne, Australia Device: Pocketbook 360, Sony PRS-T1	When you say you've put more books on it, how many are we talking about? I have over 2000 books (they're actually HMTL files, but are as large as books) and I've never experienced it being what I'd call slow, and I'm incredibly impatient. Having said that, I have my folders organised in such a way that I rarely have to use the search feature. On the few occasions I have used it, it has not been slow at all. I hope you figure out your problem soon. Another thought, do you have a high class card? Different cards read at different speeds. I've got a Class 4, 4gb card (can't remember the brand at the minute).

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