| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 11 Oct 2008 18:51:57 +0100 From: Alan Cox <alan@...rguk.ukuu.org.uk> To: Pavel Machek <pavel@...e.cz> Cc: Chris Snook <csnook@...hat.com>, Stefan Monnier <monnier@....umontreal.ca>, linux-kernel@...r.kernel.org Subject: Re: Filesystem for block devices using flash storage? > > Writes to magnetic disks are functionally atomic at the sector level. No they are not. > I don't think ext3 is safe w.r.t. whole eraseblocks disappearing. So > if you write data 'nearby' root directory and power fails, bye bye > filesystem, and journal will not help. You have similar problems on rotating media. A write to a block can corrupt other blocks adjacent to the block you write, and on the latest disks the physical block size can be greater than the logical one so unless you laid your partitions out right you have read-modify-write cycles goin on. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists