44 lines
1.0 KiB
Markdown
44 lines
1.0 KiB
Markdown
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+++
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date = "2017-06-15"
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tags = ["android"]
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title = "android-tune2fs"
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slug = "android"
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+++
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Nexus7(2012)が遅い。
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> ext4 のジャーナルは HDD アクセス速度を大幅に低下させるらしい。
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```bash
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$ ls -l /dev/block/platform/sdhci-tegra.3/by-name/
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$ mount -o remount,rw /
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$ vi /fstab
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# noatime
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or
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# TWRP
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$ tune2fs -O ^has_journal /dev/block/mmcblk0p11
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$ tune2fs -O ^has_journal /dev/block/mmcblk0p12
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$ tune2fs -O ^has_journal /dev/block/mmcblk0p13
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```
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ref :
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https://qtotter.wordpress.com/2016/11/21/amazon-fire-5th-gen%E3%81%8C%E7%88%86%E9%80%9F%E3%81%AB%E3%81%AA%E3%81%A3%E3%81%9F/
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http://redtiger.tank.jp/wiki/doku.php?id=linux-handling-note:disable-ext4-journal
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https://forum.xda-developers.com/showthread.php?t=1739119
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```
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APP -> system
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CAC -> cache
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LNX -> boot.img
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MDA -> Unknown
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MSC -> Misc (bootloader commands and other misc stuff )
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PER -> usually a fat partition containing sensor calibration etc. - per device provisioned.
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SOS -> recovery.img
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UDA -> /data - "user data area"
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USP -> Staging
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```
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