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RE: External eSATA drive doesn't fdisk properly ? F8 eSATA hotplug ?



>How do I find out what host a device is running on ?
>
>Thanks

Well, using the 2.4 kernel method of /proc,
on a small server exporting some iSCSI targets here, I get this:

[root host ~]# #cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: ST3160812AS      Rev: 3.AA
  Type:   Direct-Access                    ANSI SCSI revision: 05
Host: scsi1 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: ST3160812AS      Rev: 3.AA
  Type:   Direct-Access                    ANSI SCSI revision: 05
Host: scsi2 Channel: 02 Id: 00 Lun: 00
  Vendor: LSI      Model: MegaRAID 8888ELP Rev: 1.12
  Type:   Direct-Access                    ANSI SCSI revision: 05
Host: scsi2 Channel: 02 Id: 01 Lun: 00
  Vendor: LSI      Model: MegaRAID 8888ELP Rev: 1.12
  Type:   Direct-Access                    ANSI SCSI revision: 05


But that's being deprecated by the /sys in the 2.6 kernels, and aside from
looking manually which can be tedious, I just install lsscsi,

[root host ~]# lsscsi
[0:0:0:0]    disk    ATA      ST3160812AS      3.AA  /dev/sda
[1:0:0:0]    disk    ATA      ST3160812AS      3.AA  /dev/sdb
[2:2:0:0]    disk    LSI      MegaRAID 8888ELP 1.12  /dev/sdc
[2:2:1:0]    disk    LSI      MegaRAID 8888ELP 1.12  /dev/sdd

If your distro doesn't have lsscsi or you don't want to install it just use
the /proc method...

So to rescan everything on the 8888ELP, I would issue:
[root host ~]# echo "- - -" > /sys/class/scsi_host/host2/scan

Which is exactly what I use to enumerate any new arrays I configure via the
MegaRAID cli when I can't reboot if for example I can not unmount a target.

HTH,
jlc


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