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APPENDIX
tion, such as rebuilding or migrating.
RAID controller allows user to choose the task priority (Ultra
Low (5%), Low (20%), Medium (50%), High (80%)) to balance
volume set access and background tasks appropriately. For high
array performance, specify an Ultra Low value. Like volume ini-
tialization, after a volume rebuilds, it does not require a system
reboot.
High Reliability
• Hard Drive Failure Prediction
In an effort to help users avoid data loss, disk manufacturers are
now incorporating logic into their drives that acts as an "early
warning system" for pending drive problems. This system is
called SMART. The disk integrated controller works with multiple
sensors to monitor various aspects of the drive's performance,
determines from this information if the drive is behaving
normally or not, and makes available status information to
6Gb/s SATA RAID controller rmware that probes the drive and
look at it.
The SMART can often predict a problem before failure occurs.
The controllers will recognize a SMART error code and notify the
administer of an impending hard drive failure.
• Auto Reassign Sector
Under normal operation, even initially defect-free drive media
can develop defects. This is a common phenomenon. The bit
density and rotational speed of disks is increasing every year,
and so are the potential of problems. Usually a drive can in-
ternally remap bad sectors without external help using cyclic
redundancy check (CRC) checksums stored at the end of each
sector.
The RAID controller drives perform automatic defect re-assign-
ment for both read and write errors. Writes are always com-
pleted - if a location to be written is found to be defective, the
- 6Gb/s SATA RAID TB 1
- User Manual 1
- 5.5 For Mac OS 10.X 2
- 5.6 ArcHttp Conguration 2
- Local Administration 8
- 6.2 McRAID Storage Manager 10
- 6.3 Main Menu 11
- 6.4 Quick Function 11
- 6.5 Raid Set Functions 12
- 6.5.2 Delete Raid Set 13
- 6.5.3 Expand Raid Set 13
- 6.5.4 Ofine Raid Set 14
- 6.5.5 Rename Raid Set 15
- 6.5.7 Create Hot Spare 16
- Caution: 17
- 6.5.8 Delete Hot Spare 17
- 6.5.9 Rescue Raid Set 17
- 6.6 Volume Set Functions 18
- 30/50/60) 22
- 6.6.3 Delete Volume Set 22
- 6.6.4 Modify Volume Set 23
- 6.6.4.2 Volume Set Migration 24
- 6.6.5 Check Volume Set 25
- 6.6.6 Schedule Volume Check 25
- 6.7 Physical Drive 26
- 6.7.4 Clone Disk 28
- 6.7.5 Abort Cloning 29
- 6.7.7 Activate Failed Disk 30
- 6.7.6 Set Disk To Be Failed 30
- 6.7.8 Identify Enclosure 31
- 6.7.9 Identify Drive 31
- 6.8 System Controls 32
- • Max Command Length 33
- 6.8.2 Advanced Conguration 36
- 6.8.3 HDD Power Management 40
- 6.8.4 Ethernet Conguration 41
- DHCP Function 42
- Local IP address 42
- 6.8.6 SNMP Conguration 44
- 6.8.7 NTP Conguration 44
- 6.8.8 View Events/Mute Beeper 46
- 6.8.9 Generate Test Event 46
- 6.8.10 Clear Events Buffer 46
- 6.8.11 Modify Password 47
- 6.9 Information 48
- APPENDIX 49
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