Hi, On Thu, 10 May 2012 00:33:30 +0100, Zeke Rondel wrote: > Hi, > > I've a small memory card (SD) of 64MB used for keys related to crypto. > stuff so I need a log filesystem that avoids the data can be re-written > or modified. Is NILFS suitable in case of little devices? If so, which > size of blocks per segment would be suitable for it? Thanks in advance!
Basically NILFS is not designed for small devices. Its most on-disk data items have 64-bit width. In addition, it's more likely to suffer from disk full on such devices due to the copy-on-write nature. However, I guess you can use NILFS on 64MB SD card by formatting the device with a smaller block size and a smaller number of blocks per segment. My mkfs format parameter for a 64MB sized device is as follows: $ mkfs -t nilfs2 -b 1024 -B 512 <device> We may get more disk space overhead for much smaller "blocks per segment" because every segment of NILFS needs at least one header block. Regards, Ryusuke Konishi -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
