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Message-ID: <C0489DC3A08C21449F8FE865472DC75204834F08@BUDMLVEM03.e2k.ad.ge.com> Date: Wed, 14 Nov 2012 11:41:59 +0100 From: "Ohlsson, Fredrik (GE Healthcare, consultant)" <Fredrik.Ohlsson@...com> To: <linux-ext4@...r.kernel.org> Subject: ext4 settings in an embedded system Hi, I would like to have advice regarding features and options. I am working with an embedded system equipped with an IDE Flash Disk and the ext4 filesystem. I have identified 3 problems that I would like to solve in our product. The power is abruptly turned off from time to time, this has sometimes resulted in broken Superblock (inode8) and empty files with size 0 bytes. It also happens that file changes is not committed to disk even if minutes pass before a power loss. This is very undesirable and expensive in our case, we are searching for a solution or a workaround to the problems. List with my problems I like to solve: 1. Broken Superblock (inode8). 2. Empty files, size 0. 3. Very long auto commit times, several minutes with default settings. Is ext4 a bad choice for an embedded system with I 1Gb IDE Flash Disk and Debian 2.6.32-5-686? Should we change filesystem? I am planning to set the mount flags: barrier=1, commit=1 and data=journal, is this the way to go with an embedded system and ext4? Is there more ext4 options/settings I can use to get an embedded system reliable when a power loss occurs? Best Regards Fredrik Ohlsson Software Engineer -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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