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HP 353803-B22 HP StorageWorks 1000 Modular Smart Array installation guide (254 - Page 27

Hard drive sizes and types, Spare drives, Array sizing (capacity)

UPC - 808736781619

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Table 4 RAID level comparison RAID level Alternative name I/O Fault tolerance Storage performance efficiency RAID 6 (ADG) Data striping, with two sets of Low distributed parity data High Medium * Drives in the array need to be striped across separate enclosures on different SCSI buses.When drives are selected for an array, the controller always mirrors the first half of the drives selected to the second half of the drives selected. Therefore, if the drives selected are on a different SCSI bus or in a different enclosure, the maximum fault tolerance levels will be realized. NOTE: For detailed information about the different RAID levels, see the array configuration reference guide. This guide is available on the Documentation CD and on the Technical documentation page of the MSA1000 website: http://www.hp.com/go/msa1000 . Hard drive sizes and types Hard drives in each enclosure and included in the same array should be the same size and type. When drive sizes and types are mixed within a storage enclosure, the usable capacity and the processing ability of the entire storage sub-system is affected. When hard drives of different types or sizes are included in the same enclosure, the processing characteristics of the entire enclosure are reduced to that of the slowest and smallest drive. When hard drives of different sizes are included in a LUN, the LUN defaults to the smallest individual drive size and capacity in the larger drives is unused. Spare drives HP recommends including spare drives in your LUNs. Spares are hard drives that are not active members of any particular LUN, but have been configured to be used in the event that a drive in one of the LUNs should fail. If a spare is present and a physical hard drive fails, the spare automatically replaces the failed drive as a member of the LUN and the process of rebuilding the information onto the spare automatically begins. The system uses the mirrored or parity information from the other member drives to reconstruct the data onto the spare. Array sizing (capacity) When planning for optimal file-serving performance, you must determine the number of hard drives necessary to maintain an optimum performance level. As a general rule, the greater the number of drives that are included in an array, the greater the performance level that can be achieved. However, the performance considerations are offset by fault tolerance considerations-the greater the number of drives in an array, the higher the probability of one or more failures in that array. HP StorageWorks 1000 Modular Smart Array installation guide 27

Section	Page
Contents	3
Intended audience	7
Prerequisites	8
Related documentation	8
Document conventions and symbols	9
Table 1 Document conventions	9
Equipment symbols	10
Rack stability	11
HP technical support	11
HP-authorized reseller	12
Helpful websites	12
Installation procedures-All deployments	13
Figure 1: Overview of MSA installation procedures	14
Step 1: Review and confirm your plans	15
Determine which version of MSA controller firmware to use	15
Table 2 Basic MSA firmware and configuration options	16
Complete the planning worksheet on the poster	17
Go to the Internet for the most recent MSA and SAN information	18
Table 3 MSA1000 and SAN-related websites	18
Review MSA installation best practices	21
Planning	21
Installation	21
Ongoing	24
Plan your storage configuration	25
System and performance expectations	25
Striping methods	26
RAID levels	26
Table 4 RAID level comparison	26
Hard drive sizes and types	27
Spare drives	27
Array sizing (capacity)	27
Step 2: Prepare your site	28
Provide adequate structural support for the floor	28
Provide adequate clearance space and ventilation	28
Provide adequate and redundant sources of power	28
Table 1: MSA1000 specifications	29
Step 3: Install MSA option kits	30
Step 4: Rack the MSA and the storage enclosures	31
Rack installation best practices	31
Step 5: Install the hard drives	36
Step 6: Prepare your servers	37
Step 7: Install the HBA in your servers	38
Step 8: Prepare your switches	39
Step 9: Connect the cables	40
Cabling best practices	40
Connecting the SCSI cables	42
Recommended SCSI cable connections	42
Figure 2 SCSI I/O modules, bus numbers, and box numbers	42
Connecting the MSA to SCSI storage enclosures	43
Figure 3 SCSI cable connections to two MSA30 SCSI storage enclosures	43
Connecting the Fibre Channel cables	44
Connecting Fibre Channel cables in a singlepath configuration	45
Figure 4 Sample Fibre Channel cable connections, singlepath configuration	45
Connecting Fibre Channel cables in a multipath configuration	46
Figure 5 Sample Fibre Channel cable connections, multipath configuration	46
Connecting the power cords	47
Table 5 Levels of protection against power failures	47
Figure 6 Connecting the power cords using two UPSs	49
Step 10: Power on the devices	50
Verify the operating status of the MSA	51
View the LEDs on the MSA	51
Table 6 MSA1000 startup status lights	51
Read the messages on the controller display panel	52
Table 7 MSA1000 startup messages	52
Verify the operating status of the storage enclosures	52
Verify the operating status of the Fibre Channel switches	53
Verify the operating status of the servers	53
Step 11: Configure your MSA	54
Obtain desired controller firmware and Support Software CD versions	54
Determine which storage configuration utility to use	55
About the MSA Command Line Interface	55
About the Array Configuration Utility	55
About the Array Configuration Utility Command Line Interface	56
Configure the MSA	57
Configuration procedures-Windows environments	59
Prerequisites	59
Installing MSA-specific components on the servers	60
Updating MSA controller firmware (if necessary)	62
Configuring the storage	63
Configuration procedures-Linux environments	65
Prerequisites	65
Installing MSA-specific components on the servers	66
Updating MSA controller firmware (if necessary)	68
Configuring the storage	69
Configuration procedures-HP-UX environments	71
Prerequisites	71
Additional HP-UX support notes	72
Table 8 HP-UX required updates for active/active	72
Installing the ACU-CLI on the servers (optional)	73
Updating MSA controller firmware (if necessary)	74
Configuring the storage	74
Configuration procedures-OpenVMS environments	77
Prerequisites	77
Obtaining World Wide Port Names	78
Installing the current Fibre_SCSI patch on the servers	79
Table 9 OpenVMS Fibre_SCSI patches (as of October 2006)	79
Updating MSA controller firmware (if necessary)	80
Configuring the storage	80
Assigning ID Numbers to the controllers and LUNs	81
Configuration procedures-VMware environments	83
Prerequisites	83
Updating MSA controller firmware (if necessary)	84
VMware-specific tasks	84
Configuring the storage	87
Configuration procedures-Other environments	89
Prerequisites	89
Operating system-specific notes	90
NetWare environments	90
Tru64 UNIX environments	91
SCO UNIX environments	91
Updating MSA controller firmware (if necessary)	92
Configuring the storage	92
Powering off and powering on the MSA	95
Powering off the MSA	95
Powering on the MSA	96
Regulatory notices	99
Regulatory Compliance identification numbers	99
Federal Communications Commission notice	99
Modifications	99
Cables	99
Canadian notice (Avis Canadien)	99
European Union notice	100
Japanese notice	100
Japanese power cord notice	100
BSMI notice	100
Laser compliance	101
Battery replacement notice	102
Disposal of waste equipment by users in private households in the European Union	102
Electrostatic discharge	103
Prevention methods	103
Grounding methods	103
Worksheets	105
Table 10 MSA1000 information	106
Table 11 External Fibre Channel interconnect device (switch) information	107
Table 12 Server information	108
Table 13 Hard drive information	112
Table 14 Array (LUN) information	116
Index	119
A	119
B	119
C	119
D	119
E	119
F	119
G	120
H	120
I	120
L	120
M	120
N	121
O	121
P	121
R	121
S	121
T	122
U	122
V	122

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HP StorageWorks 1000 Modular Smart Array installation guide

NOTE:

For detailed information about the different RAID levels, see the array configuration

reference guide. This guide is available on the Documentation CD and on the Technical

documentation page of the MSA1000 website:

http://www.hp.com/go/msa1000

Hard drive sizes and types

Hard drives in each enclosure and included in the same array should be the same size and type.

When drive sizes and types are mixed within a storage enclosure, the usable capacity and the

processing ability of the entire storage sub-system is affected.

When hard drives of different types or sizes are included in the same enclosure, the processing

characteristics of the entire enclosure are reduced to that of the slowest and smallest drive.

When hard drives of different sizes are included in a LUN, the LUN defaults to the smallest

individual drive size and capacity in the larger drives is unused.

Spare drives

HP recommends including spare drives in your LUNs.

Spares are hard drives that are not active members of any particular LUN, but have been configured

to be used in the event that a drive in one of the LUNs should fail. If a spare is present and a

physical hard drive fails, the spare automatically replaces the failed drive as a member of the LUN

and the process of rebuilding the information onto the spare automatically begins. The system uses

the mirrored or parity information from the other member drives to reconstruct the data onto the

spare.

Array sizing (capacity)

When planning for optimal file-serving performance, you must determine the number of hard drives

necessary to maintain an optimum performance level.

As a general rule, the greater the number of drives that are included in an array, the greater the

performance level that can be achieved. However, the performance considerations are offset by

fault tolerance considerations—the greater the number of drives in an array, the higher the

probability of one or more failures in that array.

RAID 6 (ADG)

Data striping, with two sets of

distributed parity data

Low

High

Medium

* Drives in the array need to be striped across separate enclosures on different SCSI buses.When drives are

selected for an array, the controller always mirrors the first half of the drives selected to the second half of the

drives selected. Therefore, if the drives selected are on a different SCSI bus or in a different enclosure, the

maximum fault tolerance levels will be realized.

Table 4

RAID level comparison

RAID level

Alternative name

I/O

performance

Fault tolerance

Storage

efficiency