Mac Os X Error Replaying The Journal
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Disk0s2 I/o Error
Us Learn more about Stack Overflow the company Business Learn more about hiring developers the volume could not be verified completely or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question fsck mac and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Repair or recover drive from Mac OSX recovery mode up vote 2 down vote favorite 1 My main HDD is failing to boot. (Neither Normal nor Safe mode). Single User seems to work. I can only boot from Recovery Mode or DVD. The scenario was the following: Computer was asleep (lid down). Lifted the lid then connected USB mouse. Mouse nor trackpad nor keyboard responded. Closed the lid, removed the USB mouse then opened the lid again. Trackpad and keyboard responsive once again, but after trying to close some programs computer freezes. Shutdown computer by pressing power button for 10 seconds. At restart computer doesn't boot anymore. When booting in verbose I noticed the following: ... ... USBMSC Identifier (non-unique): 000000009833 0x5ac 0x8403 0x9833 disk0s2: I/O error. 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErrNo 5] [IOType Write] [PBlkNum 2] [FSLogMsgID 61471212] [FSLogMsgOrder First] 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [FSLogMsgID 61471212] [FSLogMsgOrder Last] jnl: unknown-dev: update_fs_block: failed to update block 2 (ret 5) jnl: unknown-dev: journal_open: Error replaying the journal! hfs: early jnl init: failed to open/create the journal (retval 0) Kernel is LP64 com.apple.launchd 1 com.apple.launchd com.apple.launchd 1 com.apple.launchd *** com.apple.launchd 1 com.apple.launchd ** /dev/rdisk0s2 (NO WRITE) ** Root file system Executing fsck_hfs (version diskdev_cmds-557-393) jnl: disk0s2: replay_journal: from 13043200 to: 3971072 (joffset 0x15502000) disk0s2: I/O error. 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErrNo 5] [IOType Write] [PBlkNum 2] [LBlkNum 2] [FSLogMsgID 1396728806] [FSLogMsgOrder First] 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevMode devfs] [MountPth /dev] [Path /dev/disk0s2] [FSLogMsgID 1396728806] [FSLogMsgOrder Last] jn
can inhibit the boot disk to be mounted 24.06.2011 Matthias Wjst The screenshot below shows my desperate search why my Macbook wouldn't boot again (following a cold reset writing a large Photoshop CS5 file for more than 15 minutes). The verbose boot mode (APPLE+S) showed some error with the journalling system, basically an error as described at the currently non functioning Apple Support Board jnl: replay_journal: bad block list header @ 0x4bra50 (checksum 0xega0fee1 http://superuser.com/questions/486048/repair-or-recover-drive-from-mac-osx-recovery-mode != 0x927a5993) jnl: journal_open: Error replaying the journal! hfs: early jnl init: failed to open/create the journal (retval 0). Unfortunately nothing helped. Booting from an external disk just showed a normal, error-free HD in disk utility. I didn't want to follow all these nice advices out there like reformat/restore or buying Disk Warrior. After 2 hours I came http://www.wjst.de/blog/sciencesurf/2011/06/a-mac-osx-journalling-error-can-inhibit-the-boot-disk-to-be-mounted/ up with hfs util rthat finally did the trick by stopping the journal even on a disk that could not be mounted using the -N switch. On the next reboot and some file permission corrections, journalling could be switched on again without any problems (although that may not even be necessary on a standalone machine), yea, yea. Related posts: Evolutionary psychology and science: The full error list | Genome browser introduces error lane | XP system crash | Biotorrents | Per aspera ad astra | bootdisk failurekernel panic Post navigation Previous PostWill the bacterial flora protect you from you allergies?Next PostLess than one mistake in every 6 million deliveries Featured Finally! 23 and the FDA warningQuite some time passed already since my last post (to be exact, more than 5 years) but now there are good news. The FDA issued a warning letter on the 22nd … The Food and... LIMIT TO 5! What about a maximum of 5 papers per year per scientist?Undoubtly, there is an avalanche o
hoakley July 4, 2016 Macs, Technology After the crash: replaying the journal to prevent diskerrors Once you have recovered your Mac from a crash/freeze/kernel panic/whatever, one of the first questions you should be asking is whether that resulted in any damage to its disk(s). There are many layers between https://eclecticlight.co/2016/07/04/after-the-crash-replaying-the-journal-to-prevent-disk-errors/ an app calling for the contents of a disk to be changed, and that change actually http://forums.macrumors.com/threads/macbook-failure-any-help-would-be-appriciated.366618/ being completed. Most actions require a sequence of steps to be performed in the correct order. So at any moment in time, there may be a queue of actions pending. When disaster strikes your Mac suddenly, chances are that some actions will still be pending. Before Apple introduced journalling to the Mac OS Extended File System (HFS+) used on your disk(s) since OS X mac os 10.2.2 in 2002, this would often leave the disk(s) in a mess, resulting in disk errors. For example, if in the instant before a freeze, an app was in the process of making a copy of a file, the new copy (which it would be writing at the time) may not have been properly written and added to the disk's directory structures. Over time, those usually minor errors would accumulate, so that after a few such crashes, they would become mac os x significant enough to cause more substantial problems on the disk, which then required more serious repair. The journal is intended to prevent that from happening. Each disk write is logged in that disk's journal as soon as it is called. As the write actions are completed, they are removed from the pending list. If a crash forces your Mac to restart, early during the startup process macOS looks at the journal to see what actions were pending and have not been completed. It then steps through those actions, ‘replaying the journal', until the disk has been brought up to date or synchronised with the journal, and reflects the state after the last journal entry. Journal replays can only occur on volumes for which journalling is turned on. When it was first introduced, journalling was an option; it is now the default and you would be most ill-advised to turn it off. The snag with HFS+ journalling is that it is aimed not at protecting data being written to files, but the directory structures and other essential information which makes the file system work. In the example given, when your Mac restarts it will correct those directories and should ensure that the drive works normally, but the data in a modified file may be junk, leaving the file corrupted. This may seem a serious omission, but it allows journalling to be much more efficient and effective. macOS does not n
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