professor Messer - troubleshooting hard drives Flashcards
this troubleshooting hard drives problem is _ •Read/write failure • “Cannot read from the source disk” • Slow performance • Constant LED activity • Retry...retry...retry • Loud clicking noise • The click of death
disk failure symptoms
this troubleshooting hard drives problem is _
• Get a backup
• First thing - a bad drive is bad
• Check for loose or damaged cables
• Check for overheating
• Especially if problems occur after startup
• Check power supply
• Especially if new devices were added
• Run hard drive diagnostics
• From the drive or computer manufacturer
• Preferably on a known-good computer
troubleshooting disk failures
this troubleshooting hard drives problem is _ • Drive not recognized • Lights (or no lights) • Beeps • Error messages • Operating system not found • The drive is there • Windows is not
boot failure symptoms
this troubleshooting hard drives problem is _
• Check your cables
• Physical problem
• Check boot sequence in BIOS
• Check for removable disks (especially USB)
• Check for disabled storage interfaces
• For new installation, check hardware configuration
• Data and power cables
• Try different SATA interfaces
• Try the drive in a different computer
troubleshooting boot failures
this troubleshooting hard drives problem is _
• Missing or faulty RAID controller
RAID not found
this troubleshooting hard drives problem is _
Each RAID is different
• Don’t start pulling drives until you check the console!
RAID stops working
this troubleshooting hard drives problem is _
• Windows Stop Error,
• Apple spinning wait cursor - A very serious issue
• May indicate a storage device issue
• Diagnostics needed for drive and motherboard
crash screens
this troubleshooting hard drives problem is _ • Self-Monitoring, Analysis, and Reporting Technology • Use third-party utilities • Avoid hardware failure • Look for warning signs • Schedule disk checks • Built-in to most drive arrays • Warning signs • Replace a drive
S.M.A.R.T. errors
How many disks does RAID 0 require?
2 or more
How many disks does RAID 1 require?
2 or more
How many disks does RAID 5 require?
3 or more
How many disks does RAID 10 require?
4 or more
The failure condition of RAID 0 is?
a single drive failure breaks the array with data loss
The failure condition of RAID 1 is?
array will work as long as one drive is operational
The failure condition of RAID 5 is?
need all drives operational but one
