Chapter 1
Server Hardware Installation and Management
Course: Comptia Server Sk0 005
Subject: Comptiaserver Sk0 005
Chapter: Server Troubleshooting
1• Common Problems
a- Boot Errors Occurs when the system can't locate the OS boot loader due to disk failure, corrupt boot sector, or incorrect boot order. Example: “Boot device not found” error appears after BIOS firmware upgrade—boot order reset to non-bootable volume.
b- Sector Block Errors Bad sectors on a disk cause read/write errors and file corruption. Often detected by S.M.A.R.T. or during disk scans. Example: chkdsk reports unreadable sectors; running low-level diagnostics confirms bad sectors in system partition.
c- Cache Battery Failure Battery-backed RAID cache stores write operations before committing to disk. A failed battery disables write caching, impacting performance. Example: RAID controller logs “Cache battery failed—write-back disabled,” leading to degraded I/O throughput.
d- Read/Write Errors Caused by media degradation, failing heads (HDD), SSD wear-leveling failure, or cable/controller faults. Tools: smartctl, manufacturer diagnostic utilities.