* nilfs on bare NAND flash
@ 2010-12-03 12:41 Kurt Van Dijck
[not found] ` <20101203124151.GC662-MxZ6Iy/zr/UdbCeoMzGj59i2O/JbrIOy@public.gmane.org>
0 siblings, 1 reply; 3+ messages in thread
From: Kurt Van Dijck @ 2010-12-03 12:41 UTC (permalink / raw)
To: linux-nilfs-u79uwXL29TY76Z2rM5mHXA
Hello,
I may not be the first to ask this type of question, but I was unable
to find the answer yet.
I'm looking for a solution to provide a filesystem
in bare NAND flash (no compact flash or SSD).
Is NILFS2 capable of running in bare NAND flash?
I see these 2 issues:
1) how are bad blocks handled
2) Do I need the caching block device, or the char device?
Thanks in advance,
Kurt Van Dijck
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^ permalink raw reply [flat|nested] 3+ messages in thread[parent not found: <20101203124151.GC662-MxZ6Iy/zr/UdbCeoMzGj59i2O/JbrIOy@public.gmane.org>]
* Re: nilfs on bare NAND flash [not found] ` <20101203124151.GC662-MxZ6Iy/zr/UdbCeoMzGj59i2O/JbrIOy@public.gmane.org> @ 2010-12-03 15:23 ` Ryusuke Konishi [not found] ` <20101204.002344.133215853.ryusuke-sG5X7nlA6pw@public.gmane.org> 0 siblings, 1 reply; 3+ messages in thread From: Ryusuke Konishi @ 2010-12-03 15:23 UTC (permalink / raw) To: kurt.van.dijck-/BeEPy95v10; +Cc: linux-nilfs-u79uwXL29TY76Z2rM5mHXA Hi, On Fri, 3 Dec 2010 13:41:51 +0100, Kurt Van Dijck wrote: > Hello, > > I may not be the first to ask this type of question, but I was unable > to find the answer yet. > > I'm looking for a solution to provide a filesystem > in bare NAND flash (no compact flash or SSD). > Is NILFS2 capable of running in bare NAND flash? > I see these 2 issues: > 1) how are bad blocks handled Well, NILFS2 neither is optimized to bare flash devices nor supports MTDs. It tries to avoid bad blocks in units of segment, and uses a partition as a circular buffer, but doesn't have wear leveling in the filesystem. In addition, two super blocks of NILFS2 are written back to absolute locations of the device more times than other blocks. Some flash filesystems such as ubifs, jffs2, and logfs have the wear leveling and are available for MTDs. These seem better if you don't need snapshots. > 2) Do I need the caching block device, or the char device? Maybe. I don't know whether NILFS2 works on the caching block device. I haven't tried it yet. Cheers, Ryusuke Konishi -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 3+ messages in thread
[parent not found: <20101204.002344.133215853.ryusuke-sG5X7nlA6pw@public.gmane.org>]
* Re: nilfs on bare NAND flash [not found] ` <20101204.002344.133215853.ryusuke-sG5X7nlA6pw@public.gmane.org> @ 2010-12-03 15:46 ` Kurt Van Dijck 0 siblings, 0 replies; 3+ messages in thread From: Kurt Van Dijck @ 2010-12-03 15:46 UTC (permalink / raw) To: Ryusuke Konishi; +Cc: linux-nilfs-u79uwXL29TY76Z2rM5mHXA > > Cheers, > Ryusuke Konishi Thanks for the reply, this saves me some investigation. Kurt -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-12-03 12:41 nilfs on bare NAND flash Kurt Van Dijck
[not found] ` <20101203124151.GC662-MxZ6Iy/zr/UdbCeoMzGj59i2O/JbrIOy@public.gmane.org>
2010-12-03 15:23 ` Ryusuke Konishi
[not found] ` <20101204.002344.133215853.ryusuke-sG5X7nlA6pw@public.gmane.org>
2010-12-03 15:46 ` Kurt Van Dijck
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