Intel S2600CP Software User Guide for Windows* - Page 18

Online Array/Volume Capacity Expansion, Read Patrol, Verify and Repair, Check Pointing

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RAID Features 2.5.15 Online Array/Volume Capacity Expansion Intel® RSTe will provide the ability to add new drives to an existing array and expand existing volumes accordingly. This is supported only under RAID 0 and RAID 5. 2.5.16 Read Patrol Intel® RSTe will provide support for Read Patrol, which checks the RAID volumes for errors that could result in a failure. The checks are done periodically in background and will verify all sectors of all RAID volumes that are connected to either the AHCI or SCU controllers. If an issue is discovered an attempt at corrective action is taken. Read Patrol can be enabled or disabled manually. The background process begins when there is no I/O to the RAID volume, though it can continue to run while I/O's are being processed. 2.5.17 Verify and Repair Intel® RSTe will provide support for Verify and Repair. The RAID volume data verification process identifies any inconsistencies or bad data on a RAID 0, RAID 1, RAID 5, or RAID 10 volume. The RAID volume data verification and repair process identifies and repairs any inconsistencies or bad data on a RAID 1, RAID 5, or RAID 10 volume. The following describes what occurs for each RAID level: RAID Level RAID 0 RAID 1 RAID 5 RAID 10 Verify Bad blocks are identified Bad blocks are identified Data on the mirror drive is compared to data on the source drive. Bad blocks are identified Parity is recalculated and compared to the stored parity for that stripe. Bad blocks are identified Data on the mirror is compared to data on the source. Table 1. Verify and Repair Verify and Repair N/A Bad blocks are reassigned If the data on the mirror drive does not match the data on the source drive, the data on the mirror is overwritten with the data on the source. Bad blocks are reassigned If the newly calculated parity does not match the stored parity, the stored parity is overwritten with the newly calculated parity. Bad blocks are reassigned If the data on the mirror does not match the data on the source, the data on the mirror is overwritten with the data on the source. 2.5.18 Check Pointing Intel® RSTe will provide the ability to perform Check Pointing to be able to track forward progress on read patrol, array rebuilds and volume migration if interrupts occur. After resuming, the operation will restart from the last valid stage reached. Intel® RSTe User's Guide 9

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RAID Features
Intel
®
RSTe User
’
s Guide
9
2.5.15
Online Array/Volume Capacity Expansion
Intel
®
RSTe will provide the ability to add new drives to an existing array and expand existing volumes
accordingly. This is supported only under RAID 0 and RAID 5.
2.5.16
Read Patrol
Intel
®
RSTe will provide support for Read Patrol, which checks the RAID volumes for errors that could
result in a failure. The checks are done periodically in background and will verify all sectors of all RAID
volumes that are connected to either the AHCI or SCU controllers. If an issue is discovered an attempt at
corrective action is taken. Read Patrol can be enabled or disabled manually. The background process begins
when there is no I/O to the RAID volume, though it can continue to run while I/O’s are being pr
ocessed.
2.5.17
Verify and Repair
Intel
®
RSTe will provide support for Verify and Repair.
The RAID volume data verification process identifies any inconsistencies or bad data on a RAID 0, RAID
1, RAID 5, or RAID 10 volume.
The RAID volume data verification and repair process identifies and repairs any inconsistencies or bad data
on a RAID 1, RAID 5, or RAID 10 volume.
The following describes what occurs for each RAID level:
Table 1. Verify and Repair
RAID Level
Verify
Verify and Repair
RAID 0
Bad blocks are
identified
N/A
RAID 1
Bad blocks are
identified
Bad blocks are reassigned
Data on the mirror
drive is compared to
data on the source
drive.
If the data on the mirror drive does not match the data on the
source drive, the data on the mirror is overwritten with the
data on the source.
RAID 5
Bad blocks are
identified
Bad blocks are reassigned
Parity is recalculated
and compared to the
stored parity for that
stripe.
If the newly calculated parity does not match the stored parity,
the stored parity is overwritten with the newly calculated
parity.
RAID 10
Bad blocks are
identified
Bad blocks are reassigned
Data on the mirror is
compared to data on
the source.
If the data on the mirror does not match the data on the
source, the data on the mirror is overwritten with the data on
the source.
2.5.18
Check Pointing
Intel
®
RSTe will provide the ability to perform Check Pointing to be able to track forward progress on read
patrol, array rebuilds and volume migration if interrupts occur. After resuming, the operation will restart
from the last valid stage reached.