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My block devices are named sda, sdb and so on.

What happens when I get to sdz? Is the next one going to be called sdaa?

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up vote 21 down vote accepted

Yes. The kernel will continue to assign names in the form of sdaa, sdab and so on. There may be a bug preventing it from going beyond sdzzz, but in theory, it's going to continue forever (that is up to 18278 due to data type limitations).

my thanks to Rinzwind for providing the links

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Not a problem :) Good answer! – Rinzwind Jun 7 '11 at 12:30
small problem: 18278 is virtio-blk. currently sata is expected (untested) to do 29 z's. – Rinzwind Jan 19 '15 at 15:33

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