What is /dev/sda1?

BajaNick · 03-13-2005, 11:07 PM

I keep seeing /dev/sda1 in fstabs. What is that device name for?

slakmagik · 03-13-2005, 11:08 PM

SCSI disks or devices that are treated as such.

DrOzz · 03-13-2005, 11:20 PM

well sd is for removable scsi devices .. the a and the b's, etc .. {examples sda, sdb} are the equivalent to the concept of hda, and hdb, etc ...when different devices
are plugged in, they are mapped to sda, sdb, etc ... so if you plug in a usb mp3 player
it will map to /dev/sda, and then you plug in a digital camera it is mapped to sdb, etc ..
so since it does stand for removable scsi devices, usb mass storage devices also
appear under these devices posing as scsi removable devices ...

i hope i was somewhat clear

R00ts · 03-13-2005, 11:41 PM

Is there an easy way to tell what sd* device is what? I know you can look in /proc/bus/usb/devices to look at the USB devices you have plugged in...but that's all. And that file doesn't tlel you what sd* is which either.

enemorales · 03-14-2005, 09:03 AM

Well, looking at dmesg's output may provide some help...

BajaNick · 03-15-2005, 10:33 PM

If sd(a) is for scsi, Why would you use that for a USB thumbdrive?

DrOzz · 03-16-2005, 01:17 AM

Quote:

usb mass storage devices also
appear under these devices posing as scsi removable devices ...

its just how things are setup

just like you have an ide cdrom and we had
to use scsi-emulation :P
i guess you can look at it has the same concept ..