General Question

ryanfaerman's avatar

What happens in linux when you have more than 26 drives?

Asked by ryanfaerman (109points) November 20th, 2008

In linux you have your drives, /dev/sda etc.

Logically, the 26th would be /dev/sdz, but what happens after that?

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8 Answers

Anaphase's avatar

Double letters, maybe? Numbers, like /dev/sda1?

ryanfaerman's avatar

/dev/sda1 means the first partition on sda

El_Cadejo's avatar

You send the 27th and so forth my way.

I have no clue really, i would think it would add a second letter /dev/sdaa or something to that effect. The better question would be why do you have 26 drives?

ryanfaerman's avatar

I don’t. I just was wondering what would happen since I was formatting a few drives today.

waterskier2007's avatar

you use a mac?

eambos's avatar

^Do you have any idea what they’re talking about?

aaronbeekay's avatar

This will depend on the version of Linux you’re running; device files in /dev are often created automatically by the kernel and the number and naming scheme will vary. In RHEL and some IBM bullshit, this is entirely kernelspace (devfs?) and in 2.6.15+, this is mostly userspace (udev).

For example, *BSD and its cousin, Mac OS X, create device files in the /dev/diskxsx style: disk1s1 is the first partition of the first disk, etc.

Anyways, to answer the damn question, often there will be two letters added: /dev/sdaa1, /dev/sdab1. This happens on RHEL and SUSE, according to this authoritative-looking IBM handbook.

Don’t put complete faith in any of this—it seems like this is very possibly something that varies across architectures/drivers/distros/whatever.

lord I need to go to school now

waterskier2007's avatar

@eambos, sort of

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