Page 290 - CISSO_Prep_ Guide

• RAID 1 = mirroring; highest
availability but greatest cost when
scaled.
• RAID 3=striping & parity drive (byte-
level).
• RAID 4=striping & parity drive (block-
level, 512 bytes).
• RAID 5=striping and parity across all
drives.
Network Availability
• Single point of failure – basic availability, high
availability, continuous availability (has
components to apply planned outages such as
upgrades, backups).
• Massive array of inactive disks (MAID) – disks
remain dormant.
• Backups – full, differential (since last change),
and incremental (since the last backup).
• Tape arrays:
• RAIT – redundant array of inexpensive
tapes (raid for tapes).
• Network-attached storage (NAS).
• Serial-advanced technology architecture
(S-ATA).
• Online backup:
• Hierarchical Storage Management (HSM)
– combines hard disk w/ jukeboxes.
Continuous backup.
• Storage area network (SAN).