RAID 1
RAID 1 is a storage technique that mirrors identical data copies across multiple disks.
PostgreSQL Mistakes and How to Avoid Them
RAID 1 is a RAID level that maintains byte-for-byte copies of data on multiple disks through mirroring.
- How it is used
- Uses disk mirroring to reduce the impact of hard-disk failure in a PostgreSQL installation.
- How deep it goes
- Defines byte-for-byte mirroring and failure boundaries, then stops short of detailed RAID implementation.
- Examples
- Illustrates RAID 1 through a PostgreSQL server using mirrored disks alongside a streaming-replication standby.
- What you can do after
- Evaluate RAID 1 as disk-failure redundancy without mistaking it for protection against corruption or unsynchronized PostgreSQL files.
Read how PostgreSQL Mistakes and How to Avoid Them explains RAID 1 →
100 SQL Server Mistakes and How to Avoid Them
RAID-1 is a mirrored storage layout that maintains identical copies of data on separate disks.
- How it is used
- Positions RAID-1 as an I/O-performance choice for transaction-log storage.
- How deep it goes
- Links RAID-1's suitability to sequential log writes but stops short of implementation details.
- Examples
- Contrasts RAID-1 with blanket RAID-5 or RAID-6 policies applied to database volumes.
- What you can do after
- Evaluate RAID choices for transaction-log volumes where sequential writes affect I/O performance.
Read how 100 SQL Server Mistakes and How to Avoid Them explains RAID 1 →
Related concepts
- RAIDkind of · RAID is a storage technology that combines multiple disk drives to provide selected characteristics of capacity, performance, redundancy, or fault tolerance.
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