Read-write error
Items Procedures
Symptoms
●
Post error message (i.e., error
code 301)
●
Hang when working on data, les,
documents
Possible causes
Loose connection, faulty hardware.
Troubleshooting steps
1. Perform a hard reset (8. Hard reset on page 41).
2. Reset BIOS to default (9. Soft reset (Default Settings) on page 42).
3. Verify drive connection and ex cable. Reseat connection (10. Reseat cables and
connections on page 42).
4. Use the HP Hardware Diagnostics tool to test. If failed, record failure code and have the
hard drive replaced.
5. If no error with HP PC Hardware Diagnostics (UEFI) tool, try to repair the hard drive and its
les in Windows (using command “CHKDSK /f /r /x”). Use HP Restore to reinstall
the operating system, if needed.
6. Test with a veried working hard drive. If it is not recognized, the system board is faulty.
Note If there is a hard drive POST error message, see POST Error Messages and User Actions
on page 87.
Slow performance
Items Procedures
Symptoms
Slow performance even when
performing small read/write operations
Possible causes
Operating system les, hard drive is full.
Troubleshooting steps
1. Transfer data from the hard drive to create more space. Microsoft recommends at least
200 MB to sync system les.
2. Perform disk defragmentation to consolidate fragmented data on the hard drive so it will
work more eciently.
NOTE: Do not defrag an SSD.
Tips & tricks For optimal system performance, you need to place your operating system and all of your most
commonly used applications and les in the fastest hard drive (solid-state drive) and fastest
areas on the drive (primary partition of 200 GB max).
Blue screen (BSOD) error
Faulty hard drive may cause blue screen error. Perform the drive tests using the HP Diagnostics Tool to make
sure the drive is functional. If all the tests pass, see Common Blue Screen Error Messages on page 89 for
detailed troubleshooting steps.
78 Chapter 7 Troubleshooting guide
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