我有一个通过 SCSI SAN 连接的光纤通道，但我看不到它。我希望能够访问这些驱动器，就像它们已安装一样。
也许整个事情是我对 SCSI 设备没有太多经验，但我希望在 /dev/ 中看到一些东西，但我没有。
以下是我能看到的一些命令，看起来我的服务器看到了卡，但没有将其作为设备？我倾向于认为这是一个潜在的驱动程序问题，但我不确定。
希望这不是需要在论坛重定向中进行搜索的内容，但如果这超出了范围，请告诉我。
即使它最终只是一个可以阅读以便更好地理解这一点的链接，如果它能帮助我解决这个问题，我也会很乐意接受它。
lspci -nn | grep "Fibre Channel"
0d:00.0 Fibre Channel [0c04]: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA [1077:2432] (rev 03)
0d:00.1 Fibre Channel [0c04]: QLogic Corp. ISP2432-based 4Gb Fibre Channel to PCI Express HBA [1077:2432] (rev 03)
>
[root@ ~]# dmesg | grep HUASY
[ 3.377927] scsi 0:0:0:0: Direct-Access HUASY S5500T 2 PQ: 1 ANSI: 4
[ 3.419624] scsi 0:0:1:0: Direct-Access HUASY S5500T 2 PQ: 1 ANSI: 4
[ 3.717599] scsi 1:0:0:0: Direct-Access HUASY Dorado2100 2 PQ: 1 ANSI: 4
[ 3.755084] scsi 1:0:1:0: Direct-Access HUASY S5500T 2 PQ: 1 ANSI: 4
[ 3.796961] scsi 1:0:2:0: Direct-Access HUASY S5500T 2 PQ: 1 ANSI: 4
[ 4.371104] scsi 0:0:2:0: Direct-Access HUASY Dorado2100 2 PQ: 1 ANSI: 4
[ 1173.634215] scsi 0:0:0:0: Direct-Access HUASY S5500T 2 PQ: 1 ANSI: 4
[ 1173.675895] scsi 0:0:1:0: Direct-Access HUASY S5500T 2 PQ: 1 ANSI: 4
[ 1173.719362] scsi 0:0:2:0: Direct-Access HUASY Dorado2100 2 PQ: 1 ANSI: 4
[ 1177.544427] scsi 1:0:0:0: Direct-Access HUASY Dorado2100 2 PQ: 1 ANSI: 4
[ 1177.581499] scsi 1:0:1:0: Direct-Access HUASY S5500T 2 PQ: 1 ANSI: 4
[ 1177.623165] scsi 1:0:2:0: Direct-Access HUASY S5500T 2 PQ: 1 ANSI: 4
我难道不应该看到所有这些设备的 /dev/device 名称吗？
lsscsi
[0:0:0:0] disk HUASY S5500T 2 -
[0:0:1:0] disk HUASY S5500T 2 -
[0:0:2:0] disk HUASY Dorado2100 2 -
[1:0:0:0] disk HUASY Dorado2100 2 -
[1:0:1:0] disk HUASY S5500T 2 -
[1:0:2:0] disk HUASY S5500T 2 -
[2:0:0:0] cd/dvd Virtual CDROM 1.00 /dev/sr0
[3:0:0:0] disk Virtual Floppy 1.00 /dev/sda
[4:0:0:0] disk SEAGATE ST973402SS S229 -
[4:0:1:0] disk SEAGATE ST973402SS S229 -
[4:1:0:0] disk Dell VIRTUAL DISK 1028 /dev/sdb
>
rescan-scsi-bus.sh
Scanning SCSI subsystem for new devices
Scanning host 0 for all SCSI target IDs, all LUNs
sg2 changed: LU not available (PQual 1)
OLD: Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: HUASY Model: S5500T Rev: 2
Type: Direct-Access ANSI SCSI revision: 04
sg3 changed: LU not available (PQual 1)
OLD: Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: HUASY Model: S5500T Rev: 2
Type: Direct-Access ANSI SCSI revision: 04
sg4 changed: LU not available (PQual 1)
OLD: Host: scsi0 Channel: 00 Id: 02 Lun: 00
Vendor: HUASY Model: Dorado2100 Rev: 2
Type: Direct-Access ANSI SCSI revision: 04
Scanning host 1 for all SCSI target IDs, all LUNs
sg5 changed: LU not available (PQual 1)
OLD: Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: HUASY Model: Dorado2100 Rev: 2
Type: Direct-Access ANSI SCSI revision: 04
sg6 changed: LU not available (PQual 1)
OLD: Host: scsi1 Channel: 00 Id: 01 Lun: 00
Vendor: HUASY Model: S5500T Rev: 2
Type: Direct-Access ANSI SCSI revision: 04
sg7 changed: LU not available (PQual 1)
OLD: Host: scsi1 Channel: 00 Id: 02 Lun: 00
Vendor: HUASY Model: S5500T Rev: 2
Type: Direct-Access ANSI SCSI revision: 04
Scanning host 2 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs
Scanning for device 2 0 0 0 ...
OLD: Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: Model: Virtual CDROM Rev: 1.00
Type: CD-ROM ANSI SCSI revision: -1
Scanning host 3 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs
Scanning for device 3 0 0 0 ...
OLD: Host: scsi3 Channel: 00 Id: 00 Lun: 00
Vendor: Model: Virtual Floppy Rev: 1.00
Type: Direct-Access ANSI SCSI revision: -1
Scanning host 4 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs
Scanning for device 4 0 0 0 ...
NEW: Host: scsi4 Channel: 00 Id: 00 Lun: 00
Vendor: SEAGATE Model: ST973402SS Rev: S229
Type: Direct-Access ANSI SCSI revision: 05
Scanning for device 4 0 1 0 ...
NEW: Host: scsi4 Channel: 00 Id: 01 Lun: 00
Vendor: SEAGATE Model: ST973402SS Rev: S229
Type: Direct-Access ANSI SCSI revision: 05
Scanning for device 4 1 0 0 ...
OLD: Host: scsi4 Channel: 01 Id: 00 Lun: 00
Vendor: Dell Model: VIRTUAL DISK Rev: 1028
Type: Direct-Access ANSI SCSI revision: 05
2 new or changed device(s) found.
[4:0:0:0]
[4:0:1:0]
0 remapped or resized device(s) found.
0 device(s) removed.
答案1
首先，找出 Linux 机器中配置了多少个主机总线适配器。您可以使用“systool -fc_host -v来验证系统中可用的 FC。
# ls /sys/class/fc_host
host0 host1
在此示例中，您需要扫描 host0 和 host1 HBA。
如果系统虚拟内存太低，则不要继续。如果您有足够的可用虚拟内存，那么您可以继续执行以下命令来扫描新的 LUN。
# echo "1" > /sys/class/fc_host/host0/issue_lip
# echo "1" > /sys/class/fc_host/host1/issue_lip
注意：您需要监视/var/log/messages 中的“issue_lip”以确定扫描何时完成。此操作是异步操作。
接下来，通过计算可用磁盘来验证新的 LUN 是否可见。
# fdisk -l 2>/dev/null | egrep '^Disk' | egrep -v 'dm-' | wc -l
如果添加了任何新的 LUN，那么您会看到比扫描 LUN 之前更多的计数。
lsblk此外，您可以通过运行或查看添加的磁盘
ls -l /dev/disk/by-path/*
...
lrwxrwxrwx 1 root root 10 Aug 15 16:49 /dev/disk/by-path/pci-0000:15:00.1-fc-0x22430080e524ebac-lun-4 -> ../../sdcx
lrwxrwxrwx 1 root root 10 Aug 15 16:49 /dev/disk/by-path/pci-0000:15:00.1-fc-0x22430080e524ebac-lun-5 -> ../../sdcy
从中您将能够识别 FC 块设备。