[Q] ext4 vs ext3 for sdext partition? - Desire Q&A, Help & Troubleshooting

Is there any major difference between an ext3 partition on one's sd card and an ext4 one? Is there any point in converting an ext3 to and ext4 (using 4ext recovery)?
Also, if I did this, can I restore a backup made from my old ext3 partition into an ext4?
Edit: This has been covered before, I only just spotted the suggested existing threads feature. Damned if I can find the way to delete this thread though.

Related

How to tell what filesystem?

Hi all, I just used CW Recovery to make a 1gb extra partition but don't know which version ext it made. Can someone provide me with some code to write in my terminal to line up my sd-card partition. Thanks.
Sent from my HTC Desire using Tapatalk
Afaik cwm makes ext2 by default, check with 'mount' from terminal, look for sd-ext and if will say ext2/3/4 next to it.
Thanks man.
It seems that the cvm provided in the [Nightly]CM7 thread made ext4 filesystem, atleast that's what I have but it could be the data2ext mod I flashed that converted the ext2 to ext4, I don't know.
More chance that the data2ext mod formated your partition with ext4

[Q] Convert ext4 to ext3 without repartitioning?

Alright, I'm running darktremor a2sd with an ext4 partition in decks 1.2 and loving it. I'm thinking about messing with synergy and know that I would need an ext3 not ext4 partition to run dta2sd. In amon ra you can upgrade from ext2 to ext3 and 3 to 4. Is there a way to "downgrade" to ext3 without wiping and repartitioning?
Thank you in advance for any help.
Not in any recovery that we have available. I thought I read at one point that you can set SD partitions in Linux, but I don't know if you downgrade in that either.
ok, thanks, thats kind of what i thought.
another question for you or those in the know......i'm pretty sure since i converted my ext3 to ext4 and resetup dta2sd that my temperatures have been getting considerably hotter than before. people suggest that that ext4 isn't the best for the life of an sd card because of extra writing going on.....could this extra work also be contributing to higher temps?
I've got my SD partitioned to ext4 on CM7 with s2e and I've haven't noticed a temperature change, but it sounds possible.

[Q] Change ROM from ext3 to ext4

Can someone explain to me how it is possible to change the ROM format on the device from ext3 to ext4?
What is to do to have DesireHD running on ext4 instead of ext3? Just simply convert the format will not work...
Thanks in advance!
You mean partition, yes?
Either by flashing melethron's ext4 format .zip (ext4_alignment.zip)
Or partition the card with some partition program (GParted, Easeus etc.)
i guess he was talking about the internal partition of his desire HD..all his post are in the desire hd section, he wrong forum

What is the use of 2nd sd-ext2 partition?

Hi,
I was formatting my memory card in DHD using 4EXT recovery and I keep wondering what is the use of second sd-ext partition? To be precise, I mean sd-ext2, not sd-ext (I know its used for apps2sd). Does it work like backup partition if the first one runs out of memory? But that wouldn't make sense, since you can just create one big partition. My second thought was that maybe you install linux on it if you want to have it in your smartphone (like ubuntu or debian).
And the second question is about swap. Does anyone uses it at all? I used to have it on my old HTC G1, but I don't think it makes sense to use it now. Are there any roms that take advantage of swap and does it make them work faster (particularly the new big sense 3.x roms)?
Thanks in advance for any responses,
BR, Jack.
edit: I wrote the same topic on my native polish board and I got responses, but that's not what I meant so I decided to write more precise what I mean.
I know there are such apps like ie. link2sd, which use second partition on the memory card as partition for storing applications, data etc. They use the bolded partition (numbers are numbers of partitions on memory card):
1. fat32
2. sd-ext
What I am talking about is second ext partition, like this:
1. fat32
2. sd-ext
3. sd-ext2
It surely doesnt mean format of partition (like ext2, ext3, ext4), it means there is a second ext partition. Both of them can be formatted differently, both can have different ext (like ext2, ext3, ext4). What is the use of sd-ext2 partition? Does it serve as a backup partition for first sd-ext? Or you can install linux on it?
from what i've seen reading around on this forum, swap isn't necessary on a desire HD, the phone has enough ram
not sure about a second sd-ext though sorry
For what i gather... only 4Ext has it... why not ask them?

[Q] Converting from ext4 to ext2

Might be a stupid question.
Well here's the deal i partitioned my sd card to ext4 (i think i'm not sure how i can find it out if it is ext3 or ext4). I was reading that ext2 was faster and quite better than ext3 or ext4 so i was thinking is there any easy way to deconvert from ext4 to ext2. What is the best way to do this preferably without loosing any data from sd card or the partition?
And how can i find out easily what partition my sdcard is ext3 or ext4?
Im not sure where you get that information but devs wouldn't recommend EXT4 partition if its gonna slowdown the performance of their roms.
I bet gparted can tell what type of ext partition you have and I bet there are other ways to find out... You can flash 4Ext Recovery and that will show you those information as well.
via xda app
4ext recovery converts partitions but only between ext3 and ext4 without data loss. Al though I am scratching my head, where did you read that ext2 is faster than others?
Ext4 has more features than Ext3 and Ext2, main advantage is journaling which gives improved performance and reliability. The only downside with ext4(also ext3) is that the SD Card wears out faster since it can perform more read/write activities. If I was you I would keep things the way they are.
deadlyboss01 said:
4ext recovery converts partitions but only between ext3 and ext4 without data loss.
Click to expand...
Click to collapse
I know but I believe it would be able to tell what type of Ext partition the sd card has
via xda app
I saw something about it on androidforums.com and somewhere else i can't remember where.
There few people said that after going from ext2 to ext3-4 the rom that they had became a little laggy and it said also that some kernel dev said to use ext2 rather than ext3-4.
Also said the same thing you deadlyboss01 said about the sd card wearing out sooner.
Is it maybe silly to use ext2 if i already have ext4?
And if i set up 4ext recovery can i restore nand backups from cwm?
And if i set up 4ext recovery can i restore nand backups from cwm?
Click to expand...
Click to collapse
I believe it can since 4ext recovery is based on cwm but better post the question on the 4ext thread to get an accurate answer. Sorry im not that sure.
via xda app
It seem that you are quite adamant. Have you personally experienced these lags?Also, I had the impression that kernel devs focused more on ext3/ext4. Nevermind, CWM is indeed compatible with 4ext recovery as Stankyou said.
No i personally have not had these lags but it seems that i'm just going to stick to 4ext and try to flash the 4ext recovery and check that out
Thanks to this thread(and others), i got some balls and knowledge. And i've installed, 4eXT Touch Recovery and then converted my ext3 partition to ext4 with 4eXT, way to easy. Needless to say, that Recovery is awesome! Thanks People! !
I also read this on ext2 being better and was confused, some guy had a htc incredible s and experienced lag with ext4 and not on ext2.
Well, i also see alot of devs using ext4 and now this thread... think this is quite simple, Use ext4 if the rom supports it.

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