Thread: [Announce] BackupMenu - OS backup & restore | New version - Jul 9th(v1.1)
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RobbieThe1st is offline RobbieThe1st
2011-07-17 , 04:45
Posts: 842 | Thanked: 1,197 times | Joined on May 2010
#845
Originally Posted by Estel View Post
Still, thanks for useful info. I suppose kernel partition is still on same physical NAND, just different partition? If that, hardware wear lvl should still apply, even if written @ low lvl by flasher. I would be very surprised, if N900 NAND lack hardware wear-leveling. Will try to check that.
eMMC/SD cards have HW wear levelling. the raw NAND flash, however, has wear-levelling in the software layer - in ubifs.
This is why it's perfectly fine to simply copy/restore images of your flash drive, SD card etc. with DD - and copy it to another device without issue, but with ubifs that copies the bad-blocks/wear leveling bits as well... which can be a problem.
It's why I had to go to tar backups instead of raw images...
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My projects: BackupMenu - OS Backup & restore | Video: Flashing your n900(LiveCD)
My devices: N770 + 8GB SD card soldered internally, N900 with 8GB SD card + Custom OC(125-950 typically).
OC freqs: 0:22,90 125:22,90 250:28,180 500:30,360 550:32,400 600:34,430 700:39,430 750:41,430 805:45,430 850:47,500 900:50,500 950:54,500 1000:58,500 1100:67,520 1150:71,520
 

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