Scanning for LUNs on Hosts

Huawei SAN Storage Host Connectivity Guide for Solaris

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After mapping LUNs on the storage system, perform the following steps on a host to discover the mapped LUNs.

To change the LUN mappings on the storage system, refer to Changing LUN Mappings When Non-Huawei Multipathing Software Is Used on a Solaris Host.

Run the cfgadm command to query all configurable hardware. This command can also re-scan for LUNs.

The command format is as follows:

root@solaris:~# cfgadm -al 
Ap_Id                          Type         Receptacle Occupant     Condition 
c2                             scsi-sas     connected    configured unknown 
c2::dsk/c2t0d0                 disk         connected    configured unknown 
c2::dsk/c2t1d0                 disk         connected    configured unknown 
c2::dsk/c2t2d0                 disk         connected    configured unknown 
c2::dsk/c2t3d0                 disk         connected    configured unknown 
c2::dsk/c2t5d0                 disk         connected    configured unknown 
c3                             fc-fabric    connected    configured unknown 
c3::20019c37f496bdb8           disk         connected    configured unknown 
c3::201a9c37f496bdb8           disk         connected    configured unknown 
c3::22380a2b3c4d5f6e           disk         connected    unconfigured unknown 
c3::2412346ac2afeaf7           disk         connected    unconfigured unknown 
c4                             fc-fabric    connected    configured unknown 
c4::20019c37f496bdb8           disk         connected    configured unknown 
c4::201a9c37f496bdb8           disk         connected    configured unknown 
c4::22380a2b3c4d5f6e           disk         connected    unconfigured unknown 
c4::2412346ac2afeaf7           disk         connected    unconfigured unknown 
usb0/1                         unknown      empty        unconfigured ok 
usb0/2                         unknown      empty        unconfigured ok 
usb0/3                         unknown      empty        unconfigured ok 
usb1/1                         unknown      empty        unconfigured ok 
usb1/2                         unknown      empty        unconfigured ok 
usb2/1                         unknown      empty        unconfigured ok 
usb2/2                         unknown      empty        unconfigured ok 
usb2/3                         unknown      empty        unconfigured ok 
usb2/4                         usb-hub      connected    configured ok 
usb2/4.1                       unknown      empty        unconfigured ok 
usb2/4.2                       unknown      empty        unconfigured ok 
usb2/4.3                       unknown      empty        unconfigured ok 
usb2/4.4                       usb-device connected    configured ok 
usb2/5                         unknown      empty        unconfigured ok 
root@solaris:~#

Run the format command on the host to query all identified LUNs.

root@solaris:~# format 
Searching for disks...done 
 
 
AVAILABLE DISK SELECTIONS: 
       0. c2t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@0,0 
       1. c2t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@1,0 
       2. c2t2d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@2,0 
       3. c2t3d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@3,0 
       4. c2t5d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@5,0 
       5. c3t201A9C37F496BDB8d1 <HUAWEI-XSG1-4303-100.00GB> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0/fp@0,0/ssd@w201a9c37f496bdb8,1 
       6. c3t201A9C37F496BDB8d2 <HUAWEI-XSG1-4303 cyl 12798 alt 2 hd 64 sec 256> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0/fp@0,0/ssd@w201a9c37f496bdb8,2 
       7. c3t20019C37F496BDB8d1 <HUAWEI-XSG1-4303-100.00GB> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0/fp@0,0/ssd@w20019c37f496bdb8,1 
       8. c3t20019C37F496BDB8d2 <HUAWEI-XSG1-4303 cyl 12798 alt 2 hd 64 sec 256> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0/fp@0,0/ssd@w20019c37f496bdb8,2 
       9. c4t201A9C37F496BDB8d1 <HUAWEI-XSG1-4303-100.00GB> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0,1/fp@0,0/ssd@w201a9c37f496bdb8,1 
      10. c4t201A9C37F496BDB8d2 <HUAWEI-XSG1-4303 cyl 12798 alt 2 hd 64 sec 256> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0,1/fp@0,0/ssd@w201a9c37f496bdb8,2 
      11. c4t20019C37F496BDB8d1 <HUAWEI-XSG1-4303-100.00GB> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0,1/fp@0,0/ssd@w20019c37f496bdb8,1 
      12. c4t20019C37F496BDB8d2 <HUAWEI-XSG1-4303 cyl 12798 alt 2 hd 64 sec 256> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0,1/fp@0,0/ssd@w20019c37f496bdb8,2 
Specify disk (enter its number):

In the preceding example, the host detects two LUNs mapped from the storage system. c3t201A9C37F496BDB8d1, c3t20019C37F496BDB8d1, c4t201A9C37F496BDB8d1, and c4t20019C37F496BDB8d1 are the drive letters of a LUN on four paths (the last disk number in the drive letters of a LUN is the same, for example, d1). c3t201A9C37F496BDB8d2, c3t20019C37F496BDB8d2, c4t201A9C37F496BDB8d2, and c4t20019C37F496BDB8d2 are the drive letters of the other LUN on four paths.

Label the detected LUNs.

Disks cannot be used by Solaris until they are labeled.

root@solaris:~# format 
Searching for disks...done 
 
 
AVAILABLE DISK SELECTIONS: 
       0. c2t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@0,0 
       1. c2t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@1,0 
       2. c2t2d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@2,0 
       3. c2t3d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@3,0 
       4. c2t5d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848> 
          /pci@0/pci@0/pci@2/scsi@0/sd@5,0 
       5. c3t201A9C37F496BDB8d1 <HUAWEI-XSG1-4303-100.00GB> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0/fp@0,0/ssd@w201a9c37f496bdb8,1 
       6. c3t201A9C37F496BDB8d2 <HUAWEI-XSG1-4303 cyl 12798 alt 2 hd 64 sec 256> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0/fp@0,0/ssd@w201a9c37f496bdb8,2 
       7. c3t20019C37F496BDB8d1 <HUAWEI-XSG1-4303-100.00GB> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0/fp@0,0/ssd@w20019c37f496bdb8,1 
       8. c3t20019C37F496BDB8d2 <HUAWEI-XSG1-4303 cyl 12798 alt 2 hd 64 sec 256> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0/fp@0,0/ssd@w20019c37f496bdb8,2 
       9. c4t201A9C37F496BDB8d1 <HUAWEI-XSG1-4303-100.00GB> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0,1/fp@0,0/ssd@w201a9c37f496bdb8,1 
      10. c4t201A9C37F496BDB8d2 <HUAWEI-XSG1-4303 cyl 12798 alt 2 hd 64 sec 256> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0,1/fp@0,0/ssd@w201a9c37f496bdb8,2 
      11. c4t20019C37F496BDB8d1 <HUAWEI-XSG1-4303-100.00GB> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0,1/fp@0,0/ssd@w20019c37f496bdb8,1 
      12. c4t20019C37F496BDB8d2 <HUAWEI-XSG1-4303 cyl 12798 alt 2 hd 64 sec 256> 
          /pci@0/pci@0/pci@8/pci@0/pci@2/QLGC,qlc@0,1/fp@0,0/ssd@w20019c37f496bdb8,2 
Specify disk (enter its number): 8 
selecting c3t20019C37F496BDB8d2 
[disk formatted] 
 
 
FORMAT MENU: 
        disk       - select a disk 
        type       - select (define) a disk type 
        partition  - select (define) a partition table 
        current    - describe the current disk 
        format     - format and analyze the disk 
        repair   - repair a defective sector 
        label      - write label to the disk 
        analyze    - surface analysis 
        defect     - defect list management 
        backup     - search for backup labels 
        verify     - read and display labels 
        save       - save new disk/partition definitions 
        inquiry    - show disk ID 
        volname    - set 8-character volume name 
        !<cmd>     - execute <cmd>, then return 
        quit 
format> p 
 
 
PARTITION MENU: 
        0      - change `0' partition 
        1      - change `1' partition 
        2      - change `2' partition 
        3      - change `3' partition 
        4      - change `4' partition 
        5      - change `5' partition 
        6      - change `6' partition 
      7      - change `7' partition 
        select - select a predefined table 
        modify - modify a predefined partition table 
        name - name the current table 
        print  - display the current table 
        label  - write partition map and label to the disk 
        !<cmd> - execute <cmd>, then return 
        quit 
partition> p 
Current partition table (original): 
Total disk cylinders available: 12798 + 2 (reserved cylinders) 
 
Part      Tag    Flag     Cylinders         Size          Blocks 
  0       root    wm       0 -    15      128.00MB    (16/0/0)       262144 
  1       swap    wu      16 -    31      128.00MB    (16/0/0)       262144 
  2     backup    wu       0 - 12797       99.98GB    (12798/0/0) 209682432 
  3 unassigned    wm       0                0         (0/0/0)             0 
  4 unassigned    wm       0                0         (0/0/0)             0 
  5 unassigned    wm       0                0         (0/0/0)             0 
  6        usr    wm      32 - 12797     99.73GB    (12766/0/0) 209158144 
  7 unassigned    wm       0                0         (0/0/0)             0 
 
partition>

In the preceding example, disk 8 (c3t20019C37F496BDB8d2) is selected. The host detects that the disk is not labeled and prompts you whether to label the disk. If you select yes, the host labels the disk and lists the commands that can be executed (if the disk has been labeled, the host lists the commands directly). This example queries the disk partition information.

Solaris supports both VTOC and EFI disk labels.

By default, VTOC labels are added to disks whose size is smaller than 1 TB. A VTOC disk has eight partitions, numbered from 0 to 7. Partition 2 indicates the entire disk. EFI labels are added to disks whose size is greater than 2 TB.

In the Solaris x86 system, a VTOC disk has 10 partitions, numbered from 0 to 9; an EFI disk has nine partitions, numbered from 0 to 8. In the Solaris SPARC system, a VTOC disk has eight partitions, numbered from 0 to 7; an EFI disk has nine partitions, numbered from 0 to 8.

In systems earlier than Solaris 11, VTOC supports disks smaller than 1 TB, while EFI supports disks greater than 1 TB.

In Solaris 11 and later versions, VTOC supports disks smaller than 2 TB, while EFI supports disks greater than 2 TB.

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Updated: 2021-09-27

Document ID: EDOC1000162776

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