Integrated Netraid controller LH3000r

[Andrew Smith_3]

Dear Sir,Madam

I have recently purchased a LH3000r server, with 2 x 18gb and 10 x 36gb HDD split over each channel equally [1x18 & 5x36 on channel a same a channel b].

The configuration I was hoping to acheive was 2x18 RAID1 and 9x36 RAID5 with 1x36 as a hot standby. When trying to setup the container for the RAID5 array eight drives seems to be the maximum that can be part of that array thus leaving one drive spare.

The intergrated Netraid is SCSI3 as this is the latest iteration of the Netserver LH3000. Is eight drives the MAXIMUM limit for an RAID5 array when using the on-board NETRAID.

Many thanks

Andrew

[Marino Meloni_1]

hy here is somes info

Symptoms
What are the Maximum Physical Hard Drives per Array?
Spanned Arrays configuration
Do all physical drives in an array need to be on the same adapter?

Goals
NetRAID Array Configuration Planning

Fix
PLANNING ARRAYS

Plan to specify which physical drives are assigned to which arrays. For each physical disk drive that is assigned to an array, make note of its array number.

When creating arrays, please consider the following:

1. Group together physical drives that have the same capacity. (If drives with different capacities in an array are used, all the drives in the array are treated as though they have the capacity of the smallest drive.)

2. Arrays are numbered sequentially beginning with Array 0.

3. Arrays can have between one and eight (8) physical drives per array.

4. The more disks grouped together in an array, the better the performance.

5. All physical drives in an array must be controlled by the same adapter.

6. The physical drives in an array can be all on the same channel, or they can be on separate channels.

7. Consider to plan on reserving one or more physical drives for use as a hot spare.

When arrays are created, think ahead toward the logical drives that will be configured later. Here are some considerations about logical drives that might impact how arrays are set up:

1. Consider what RAID levels you will need.

2. Different RAID levels require different minimum numbers of physical drives. For example, RAID 1 requires exactly two physical drives, RAID levels 3 and 5 require at least three physical drives, and arrays with only one physical drive must be assigned RAID 0.

3. Different RAID levels reserve different amounts of capacity to provide redundancy.

4. A single array can be divided into a maximum of eight logical drives.

5. A single HP NetRAID Series adapter can control a maximum of eight logical drives.

6. If the online capacity expansion feature will be used later on, logical drives cannot span arrays and there must be only one logical drive per array.

7. If one logical drive is to span two or more arrays:

A. Spanned arrays must be numbered consecutively.
B. Spanned arrays must contain the same number of disk drives per array.
C. Although each physical drive in an array must have the same capacity, one logical drive can span two or more arrays of different capacities.

For example, one array might contain three drives of 1 GB each, and the second array might contain three drives of 5 GB each. One logical drive can span both of these arrays.

D. Spanned arrays must be controlled by the same adapter.
bye

marino