🚀 go-pugleaf

Marc Eggenberger <me@everyware.ch> wrote:
> Host: scsi0 Channel: 00 Id: 04 Lun: 00
>   Vendor: Quantum  Model: DLT4000          Rev: D069
>   Type:   Sequential-Access                ANSI SCSI revision: 02

/dev/sg0 or /dev/sga since it's the first SCSI device (to be sure
check the minor of /dev/sg0 against /usr/src/linux/Documentation/devices.txt)

> Host: scsi1 Channel: 02 Id: 00 Lun: 00
>   Vendor: MegaRAID Model: LD0 RAID0  4066R Rev:   D 
>   Type:   Direct-Access                    ANSI SCSI revision: 02

/dev/sg1 or /dev/sgb

> Host: scsi1 Channel: 02 Id: 00 Lun: 01
>   Vendor: MegaRAID Model: LD1 RAID5 17354R Rev:   D 
>   Type:   Direct-Access                    ANSI SCSI revision: 02

/dev/sg2 or /dev/sgc

> wieso hab ich 4x /dev/sg* wenn cat /proc/scsi/scsi nur 3 devs zeigt ... 

Because /dev is not like /proc, ie it's not creating device entries
on demand, on the countrary: /dev/entries are created by the distribution
installation, or by the MKDEV script, and reside on-disk.

[ there is a patch to the kernel which is called devfs and replaces
  the on-disk devfs by a new similar-to-/proc approach. It's not
  standard ]

> und welches ist welches device? ich moechte mal arkeia ausprobieren und 
> muss da das entsprechende /dev/sg* angeben ... ich moechte aber lieber 
> nicht das falsche angeben und dann schreibt er auf mein raid system ... 

well, you presumably have off-site tape backups anyway already

   cd /
   tar cvf /dev/st0 --exclude='proc/*' .