Red Hat DEVICE-MAPPER MULTIPATH 5.2 Manual do Utilizador descarregar pdf (Página 3)

DotHill – Linux Device Mapper Multipath “How To” for Storage Revision 4

Contents

1 Scope........................................................................................................................4

2 Quick Start................................................................................................................4

3 Introduction..............................................................................................................5

3.1 Features of DM-MP ..................................................................................5

3.2 Software components of DM-MP............................................................6

4 Theory of Operation.................................................................................................6

4.1 Terms and Concepts ...............................................................................7

5 Installing DM-MP......................................................................................................8

5.1 RedHat Linux 4.........................................................................................8

5.1.1 Multipath Setup..................................................................................8

5.2 RedHat Linux 5.........................................................................................9

5.3 SUSE Linux 9 ...........................................................................................9

5.4 SUSE Linux 10 .........................................................................................9

6 Configuration ...........................................................................................................9

6.1 Configuring the DotHill storage array for Multipathing........................9

6.2 Configuring DM-MP with the multipath.conf file............................10

6.3 Multipath.conf (Additional Detail).........................................................11

6.3.1 System defaults (defaults)...........................................................11

6.3.2 Blacklisted devices (devnode_blacklist)..................................12

6.3.3

Per-storage-array (devices) ..........................................................12

6.3.4 Per-device settings (multipaths).................................................13

6.3.5 Unified Lun (ULP) settings (devices) ...........................................14

6.4 Multipath.conf (Recommended DotHill Storage Settings) .................14

6.4.1 SANnet II...........................................................................................14

6.4.2 R/Evolution 2730 / 5730...................................................................15

6.4.3 R/Evolution 5730 (with ULP)...........................................................15

6.4.4 R/Evolution 2330..............................................................................16

6.4.5 R/Evolution 2330 (with ULP)..........................................................16

6.4.6 R/Evolution 2530..............................................................................17

7 Configuring Host Bus Adapters ...........................................................................17

7.1 Configuring QLogic HBA parameters..................................................18

7.2 Configuring QLogic/Emulex HBAs for R/Evolution storage..............18

8 Managing DM-MP Devices ....................................................................................18

9 Known Issues.........................................................................................................20

10 Appendix A - multipath.conf.annotated file.........................................................22

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Red Hat DEVICE-MAPPER MULTIPATH 5.2 Manual do Utilizador Página 3