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Working with RAIDs with Parity Delays

Working with RAIDs with Parity Delays

R‑Studio allows you to create RAIDs with parity delays (any level that allows that). For example, let us create a RAID 5 the parity delays with the following layout:

• Three drives,

• Delay=16

• Block size: 16 KB

• Offset: 1088 sectors (544 KB)

• Block order: Left Asynchronous (Continuous)

Block order table:

	A	B	C	Delay=16
1	1	2	PD
2	3	4	PD
3	5	6	PD
4	7	8	PD
5	9	10	PD
6	11	12	PD
7	13	14	PD
8	15	16	PD
9	17	18	PD
10	19	20	PD
11	21	22	PD
12	23	24	PD
13	25	26	PD
14	27	28	PD
15	29	30	PD
16	31	32	PD
17	33	PD	34	Delay=16
18	35	PD	36
19	37	PD	38
20	39	PD	40
21	41	PD	42
22	43	PD	44
23	45	PD	46
24	47	PD	48
25	49	PD	50
26	51	PD	52
27	53	PD	54
28	55	PD	56
29	57	PD	58
30	59	PD	60
31	61	PD	62
32	63	PD	64
33	PD	65	66	Delay=16
34	PD	67	68
35	PD	69	70
36	PD	71	72
37	PD	73	74
38	PD	75	76
39	PD	77	78
40	PD	79	80
41	PD	81	82
42	PD	83	84
43	PD	85	86
44	PD	87	88
45	PD	89	90
46	PD	91	92
47	PD	93	94
48	PD	95	96

To create such RAID 5,

1	Click the Create virtual volume sets or RAIDs button and select Create Virtual Block RAID & Autodetect

or select Create Virtual Block RAID & Autodetect on the Create menu

Check that the Apply changes immediately check box is clear on the Parents tab. This will prevent R‑Studio from trying to start processing the RAID configuration until you specify it completely.

2	Drug the required objects from the Drives pane to the Parents tab and select RAID 5 on the RAID type

Other ways to add objects

These objects may be drives, logical drives, or images. Check that the objects are correctly placed.

Note: Objects should be placed in the same order as they were in the original RAID 5. If this order is incorrect, you must change it by dragging the parents to place them in the correct order.

Object control buttons

Locate	Click this button to locate the selected object in the Drives panel.
Add Empty Space/Add Missing Drive	Click this button to add an empty space or missing drive object to the RAID
Remove	Click this button to remove the selected object from the RAID
Move Up	Click this button to move up the selected object in the RAID
Move Down	Click this button to move down the selected object in the RAID
Synchronize Offsets	Click this button to make the offsets the same for all objects in the RAID
Reset changes	Click this button to return the configuration to the initial state (after clicking the Apply button or immediately after loading)

3	Specify the Block size and Offset parameters on the Parents tab

Disregard the Block order field.

4	Specify the parity delay number in the Parity delay control on the Parents tab.

The number of rows will change to 48.

5	Select Left Asynchronous (Continuous) on the Block Order Field and click the Apply button on the Parents tab

>	The created Virtual Block RAID 1 object can now be processed like regular drives/volumes

If R‑Studio detects a valid file system on this RAID object, a partition object will appear in the Drives panel.

The Description Files for RAID Configurations topic shows the RAID description file for this RAID configuration.

You also may check the RAID consistency, if necessary. See the Checking RAID Consistency help page for details.

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