Hardware
326
RAID5
In RAID5, data is distributed to HDDs by striping and, at the same time, the parity (redundant
data) is distributed to the HDDs. This mode is called "striping with distributed parity".
Each of stripe x, stripe x+1, and parity (x, x+1) created from stripe x and stripe x+1 is written onto
a specific HDD. Accordingly, the total capacity assigned to the parity is just the same as the
capacity of a single HDD. If any one of the HDDs configuring a logical drive is defected, data is
still available with no problems.
RAID6
RAID 6 extends RAID 5 by adding an additional parity block (Q) created by different calculation
method such as weighting by some factor, and thus uses block-level striping with two parity
blocks distributed across all the member disks. This mode is called "striping with duplex and
distributed parity". Accordingly, the total capacity assigned to the parity is just the same as the
capacity of two HDDs. If two of the HDDs configuring a logical drive are defective, data is still
available.
HDD 1
RAID Controller
HDD 2
HDD 3
Stripe 1
Stripe 4
Stripe 2
Pality P(3,4)
Pality P(1,2)
Pality Q(3,4)
Pality P(5,6)
Pality Q(5,6)
Stripe 5
HDD 4
Pality Q(1,2)
Stripe 3
Stripe 6
Pality Q(7,8)
Stripe 7
Stripe 8
Pality P(7,8)
HDD 1
RAID Controller
HDD 2
HDD 3
Stripe 1
Stripe 4
Stripe 2
Pality(3,4)
Pality(1,2)
Stripe 3
Pality(5,6)
Stripe 5
Stripe 6
Содержание Express 5800
Страница 73: ...73 Memo ...
Страница 279: ...Hardware 279 3 BIOS Menu screen is displayed ...
Страница 336: ...Hardware 336 Display Screen for WebBIOS Physical Drives Property Screen for Universal RAIDUtility Physical Devices ...
Страница 339: ...Hardware 339 3 BIOS will start Select Save Exit then press Enter ...
Страница 365: ...Hardware 365 6 Select Home at the lower left of the screen and press Enter to go back to WebBIOS Home Menu ...
Страница 444: ...444 Part Number Part number FRU File ID FRU file ID Asset Tag Asset management tag ...
Страница 526: ...526 Then input User Name for Authentication and select Keyboard interactive Then input Password ...
Страница 573: ...573 Memo ...
Страница 583: ...Software 583 Memo ...
Страница 690: ...Operation and Maintenance 690 Memo ...
Страница 719: ...XXIX Memo ...