Rebuilding Catalog B Tree I O Error
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Please enter a title. You can not post a blank message. Please type your message and try again. TS2570: Mac OS X: Gray screen appears during startup Learn about Mac OS X: Gray screen appears during startup dean14 Level disk0s2 i/o error macbook pro 1 (1 points) Q: disk0s2: i/o error iMac would not boot up past Grey Apple
Disk0s2 I/o Error The Volume Macintosh Hd Could Not Be Verified Completely
screen on repeated attempts. tried to reboot in safe mode with tracking on and after several lines of boot up code it
Disk0s2 I/o Error Fix
stopped and I get a reparated disk0s2: I/O error. message.What does this mean? Posted on Jan 12, 2013 3:28 PM I have this question too Close Q: disk0s2: i/o error All replies Helpful answers by vea1083,
What Is Disk0s2
vea1083 Jan 12, 2013 7:24 PM in response to dean14 Level 3 (696 points) Jan 12, 2013 7:24 PM in response to dean14 dean14 wrote:iMac would not boot up past Grey Apple screen on repeated attempts. tried to reboot in safe mode with tracking on and after several lines of boot up code it stopped and I get a reparated disk0s2: I/O error. message.What does this mean?I would suggest you to see diskos2 io error mac the following Apple Support Article:http://support.apple.com/kb/TS1417Best! Helpful (1) Reply options Link to this post by dean14, dean14 Jan 12, 2013 8:12 PM in response to vea1083 Level 1 (1 points) Jan 12, 2013 8:12 PM in response to vea1083 Thanks for the suggestion. I ran the fsck check and if did not finish. It stopped in the ** Rebuilding catalog B-tree section. Kept repeating disk0s2: I/O error. Helpful (0) Reply options Link to this post by Samurai2k, Samurai2k May 10, 2013 6:55 AM in response to dean14 Level 1 (0 points) May 10, 2013 6:55 AM in response to dean14 kernel[0]: disk0s2: I/O error.My iMac starts up slow and often stops working during the day after these errors. I run the Disk Utility frequently and it never finds any errors, but it is only a bandaid. How do I fix the issue ?My iMac 24-inch, Early 2008Processor 3.06 GHz Intel Core 2 DuoMemory 4 GB 800 MHz DDR2 SDRAMI can not add anymore physical ramGraphics NVIDIA GeForce 8800 GS 512 MBSoftware OS X 10.8.3 (12D78)kernel[0]: disk0s2: I/O error. Helpful (0) Reply options Link to this post by WZZZ, WZZZ May 10, 2013 7:00 AM in response to Samurai2k Level 6 (13,122 points) Mac OS X May 10, 2013 7:00 AM in response to Samurai2k The I/O error
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us disk0s2 i/o error invalid node structure Learn more about Stack Overflow the company Business Learn more about hiring developers disk0s2 i/o error the volume could not be verified completely or posting ads with us Ask Different Questions Tags Users Badges Unanswered Ask Question _ Ask Different is a question and disk0s2 media is not present answer site for power users of Apple hardware and software. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best https://discussions.apple.com/thread/4700518?tstart=0 answers are voted up and rise to the top Repair disk from single user mode (fsck fails) up vote 17 down vote favorite 8 Earlier today my 2009 iMac emitted I/O errors trying to copy files. So I ran disk utility, verify disk to see if anything was amiss. It was. But as it's my startup disk I couldn't repair it, so I tried safe mode. Safe mode http://apple.stackexchange.com/questions/56461/repair-disk-from-single-user-mode-fsck-fails worked the very first time, but when I rebooted it shows the progress bar filling up, before halting. Every time I turn it on now, the same progress bar then crash happens. Booting in verbose mode reveals fsck is failing with signal 8. Using single-user mode, as that's as far as I'm aware the only way I can get any access to the system, I've been running fsck_hfs. However, it always fails. Below is the output from fsck_hfs -d /dev/disk0s2. ** /dev/rdisk0s2 Using cacheBlockSize=32K cacheTotalBlock=65536 cacheSize=2097152K. ** Root file system Executing fsck_hfs (version diskdev_cmds-491.6~3). ** Verifying volume when it is mounted with write access. ** Checking Journaled HFT Plus volume. ** Checking extents overflow file. ** Checking catalog file. Missing thread record (id = 9931104) Missing thread record (id = 16434146) Missing thread record (id = 19370458) disk0s2: I/O error hfs_swap_BTNode: offsets 10 and 11 out of order (0x0000, 0x0000) Invalid node structure (4, 115897) ** The volume Macintosh HD could not be verified completely. volume check failed with error 7 volume type is pure HFS+ primary MDB is at block 0 0x00 alternate MDB is at block 0 0x00 primary VHB is at block 2 0x02 alternate VHB is at block
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more http://apple.stackexchange.com/questions/91426/macintosh-hd-missing-after-failed-catalog-btree-rebuilding about Stack Overflow the company Business Learn more about hiring developers or posting ads http://forums.macrumors.com/threads/disk0s2-i-0-error-invalid-node-structure.1087177/ with us Ask Different Questions Tags Users Badges Unanswered Ask Question _ Ask Different is a question and answer site for power users of Apple hardware and software. 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 o error rise to the top Macintosh HD missing after failed catalog btree rebuilding up vote 3 down vote favorite 1 There is an I/O error in the hard disk in my MacBook Pro running Mountain Lion and as I start it up, a progress bar fills up and then it shuts down on its own. I attempted to recover the files in single-user mode and try to fix it by rebuilding disk0s2 i/o error the catalog btree as in this answer: fsck_hfs -Rc -d /dev/disk0s2 Unfortunately it encountered numerous errors as it approached the part with a disk error. Since then the Macintosh HD does not mount in single-user mode and I am only left with the Mac OS X Base System. Running df -hl on the 500GB drive gives the following: Filesystem Size Used Avail Capacity iused ifree %iused Mounted on root_device 1.2Gi 1.1Gi 106Mi 92% 280978 27978 91% / of which 1.2GB represents the Mac OS X Base System. fsck_hfs -l /dev/disk0s2 gives: ** Checking catalog file. Missing thread record (id = 18) File record has hard link chain flag (id = 38468309) File has incorrect number of links (id = 38468309) (It should be 1 instead of 2) ... Missing thread record (id = 216712) ... Incorrect number of thread records (4, 202) Incorrect number of thread records (4, 202) ** Checking multi-linked files. Incorrect number of file hard links ** Checking catalog hierarchy. ** The volume could not be verified completely. And /sbin/fsck/ -fy gives: ** The volume Mac OS X Base System appears to be OK. I tried to manually mount the drive with mount -t hfs /dev/disk0s2 "/Volumes/Macintosh HD" but it didn't work: hfs_mounts: failed to moun
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