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MacBook Pro won't load past white apple logo screen

The macbook pro won't load past the apple logo screen, I tried command+s on start up, and I tried command + v on startup, It showed me a repeated error message

jnl:unkown-dev:do_jnl_io:strategy ewrr 0x5

jnl: unknown dev: could not read 512 bytes for the journal header.

hsf: late jnl init: failed to open/create journal (retrieval 0)

hsf_mounthfsplus: hsf_late_journal_init returned (22)

hsf_mounthfplus: encountered error (22)

hsf_mountfd: encountered failure 22

hsf_mountroot: hsf_mountfs returned 22 rvp (0xffffff800badff00) name (Unknown device)

cannot mount root, errno = 19

rooting via boot-uuid from /chosen: 3CF4A65E-EE84-3174-B212-9014999EF1AF

waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourcematch</key><keystring ID="2">boot-uuid-media</string></dict>

Got boot on device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleAPIPCI/SATA@1F ,2/AppleIntelPchSeriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlock

StorageDevice/IOBlockStorageDriver/TOSHIBA MK5065GSXF Media/IOGUIDPartit

BSD root: disk0s2

disk0s2: I/O error

0 [Level 3] [ReadUID 0] [Facility] [Err type IO] [ErrNo 5] [IOType Read] [PBlkNum 515184] [FSLogMsgID 2064894641] [FSLogMsgOrder First]

0 [Level 3] [ReadUID 0] [Facility] [FSLogMsgID 1051684345] [FSLogMsgOrder Last]

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Chosen Solution

Try a safe (shift) boot. Try booting to your install disk or AHT (D boot).

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karen smith will be eternally grateful.
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