MacBook Pro almost frooze, would like to know why

Hey
About a half hour ago I came back to my computer and it was extremely sluggish. I began shutting applications down but only with the Activity Monitor running the Active RAM was 1.15 GBs. I tried to open up my console but it would not respond. I eventually had to do a hard shut down since it was taking way too long to restart.
It booted up just fine and is now working well. When I went to check the System.Log in the Console, the last log was at 12:20 am, before jumping to 12:56 when I rebooted.
Does anyone know why this may have happened?
Here is a sample of the log. The entire log for 12:20 is insanely long, so I am only posting the last bit of it before I shut down.
Nov 6 00:20:27 BETA kernel[0]: 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode devfs] [MountPt /dev] [Path /dev/disk3s2] [FSLogMsgID 1155533442] [FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: s] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 35797] [LBlkNum 35797] [FSLogMsgID 185284135] [FSLogMsgOrder First]
Nov 6 00:20:27 BETA kernel[0]: l: disk3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe81000)
Nov 6 00:20:27 BETA kernel[0]: disk3s2: 0x5 (UNDEFINED).
Nov 6 00:20:27 BETA kernel[0]: : disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: ck @ 0x2f9a00!
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: restarting journal replay (3119616 - 3309056)!
Nov 6 00:20:27 BETA kernel[0]: s] [DevNode devfs] [MountPt /dev] [Path /dev/disk3s2] [FSLogMsgID 1396361971] [FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: BlkNum 35797] [LBlkNum 35797] [FSLogMsgID 1742336863] [FSLogMsgOrder First]
Nov 6 00:20:27 BETA kernel[0]: : disk3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe81000)
Nov 6 00:20:27 BETA kernel[0]: disk3s2: 0x5 (UNDEFINED).
Nov 6 00:20:27 BETA kernel[0]:
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: restarting journal replay (3119616 - 3309056)!
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: from: 3119616 to:] [FSLogMsgID 536802349] [FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: jnl: 7] [LBlkNum 35797] [FSLogMsgID 1642322114] [FSLogMsgOrder First]
Nov 6 00:20:27 BETA kernel[0]:
Nov 6 00:20:27 BETA kernel[0]: isk3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe81000)
Nov 6 00:20:27 BETA kernel[0]: diLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: Could not read block list header block @ 0x2f9a00!
Nov 6 00:20:27 BETA kernel[0]: 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode devfs] [MountPt /dev] [Path /dev/disk3s2] [FSLogMsgID 1143077769] [FSLogMsgOrdersystem.fs] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 35797] [LBlkNum 35797] [FSLogMsgID 919859420] [FSLogMsgOrder First]
Nov 6 00:20:27 BETA kernel[0]: l: disk3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe81000)
Nov 6 00:20:27 BETA kernel[0]: disk3s2: 0x5 (UNDEFINED).
Nov 6 00:20:27 BETA kernel[0]:
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: restarting journal replay (m.apple.system.fs] [DevNode devfs] [MountPt /dev]NED).
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe81000)
Nov 6 00:20:27 BETA kernel[0]: FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: Could not read block list header block @ 0x2f9a00!
Nov 6 00:20:27 BETA kernel[0]: 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode devfs] [MountPt /dev] [Path /dev/disk3s2] [FSLogMsgID 1820291850] [FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: Could not readD 143431717] [FSLogMsgOrder First]
Nov 6 00:20:27 BETA kernel[0]:
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: from: 3119616 to: 3309056 (joffset08059340] [FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: Could not read block list header block @ 0x2f9a00!
Nov 6 00:20:27 BETA kernel[0]: 0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode devfs] [MountPt /dev] [Path /dev/disk3s2] [FSLogMsgID 511161763] [FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: em.fs] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 35797] [LBlkNum 35797] [FSLogMsgID 521653519] [FSLogMsgOrder First]
Nov 6 00:20:27 BETA kernel[0]: l: disk3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe81000)
Nov 6 00:20:27 BETA kernel[0]: disk3s2: 0x5 (UNDEFINED).
Nov 6 00:20:27 BETA kernel[0]: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: Could not read block list header block @ 0x
Nov 6 00:20:27 BETA kernel[0]:
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe8 [FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: CouldLogMsgID 260772780] [FSLogMsgOrder First]
Nov 6 00:20:27 BETA kernel[0]:
Nov 6 00:20:27 BETA kernel[0]: disk3s2: 0x5 (UNDEFINED).
Nov 6 00:20:27 BETA kernel[0]:
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: replay_journal: from: 3119dev/disk3s2] [FSLogMsgID 237818421] [FSLogMsgOrder Last]
Nov 6 00:20:27 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:27 BETA kernel[0]: [PBlkNum 35797] [LBlkNum 35797] [FSLogMsgID 1266575621] [FSLogMsgOrder First]
Nov 6 00:20:28 BETA kernel[0]: vel 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 35797] [LBlkNum 35797] [FSLogMsgID 1745538543] [FSLogMsgOrde309056)!
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: replay_journal: [Path /dev/disk3s2] [FSLogMsgID 1347691822] [FSLogMsgOrder Last]
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:28 BETA kernel[0]: um 35797] [LBlkNum 35797] [FSLogMsgID 761623095] [FSLogMsgOrder First]
Nov 6 00:20:28 BETA kernel[0]:
Nov 6 00:20:28: --- last message repeated 1 time ---
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: restarting journal replay (3119616tem.fs] [DevNode devfs] [MountPt /dev] [Path /dev/disk3s2] [FSLogMsgID 1808569263] [FSLogMsgOrder Last]
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: do] [ErrNo 5] [IOType Read] [PBlkNum 35797] [LBlkNum 35797] [FSLogMsgID 1188814659] [FSLogMsgOrder First]
Nov 6 00:20:28 BETA kernel[0]: k3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe81000)
Nov 6 00:20:28 BETA kernel[0]: disk3s2: 0x5 (UNDEFINED).
Nov 6 00:20:28 BETA kernel[0]: 2: dojnlio: strategy err 0x5
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: replay_journal: Could not read block list header block @ 0x2f9a00!
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: restarting journal replay (3119616 - 3309056)!
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: replay_journal: from: 3119616 to: 3309056 (joffset 0xe81000)
Nov 6 00:20:28 BETA kernel[0]: disk3s2: 0x5 (UNDEFINED).
Nov 6 00:20:28 BETA kernel[0]:
Nov 6 00:20:28: --- last message repeated 1 time ---
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: dojnlio: strategy err 0x5
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: replay_journal: Could not read block list header block @ 0x2f9a00!
Nov 6 00:20:28 BETA kernel[0]: jnl: disk3s2: restarting journal replay (3119616 - 3309056)!

I would have to agree. ooks like your HDD may be failing. That will cause sluggishness, and long bouts of it trying to access the failing portions.
I would recommend a backup of your data, and running the apple diagnostics.
Geoff

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