Fujitsu ETERNUS DX80 VFY:DX800XF030IN Folheto
Códigos do produto
VFY:DX800XF030IN
ETERNUS DX60 and DX80 Storage Sales
Copyright 2009 FUJITSU LIMITED
7
Data Block Guard
Controller
Module
Cache
ECC Protected
A0
A1
A2
CC
CC
CC
Write
Read
Apply Check Code
Verify Check Code
Verify & delete Check Code
Disk
Written data
A0
A1
A2
CC
CC
CC
A0
A1
A2
User data
A0
A1
A2
CC
CC
CC
A0
A1
A2
User data
CC: Check Code
8-byte check code applied
every 512 bytes
every 512 bytes
8-byte check code is added to every 512-byte data to
control data integrity both on the disk and in the cache
control data integrity both on the disk and in the cache
This allows manual rebuilds using parity information from the RAID group
Improve data integrity
beyond RAID
1
2
3
1
3
2
2