Are there still cd(4) changers?

Alexander Motin mav at FreeBSD.org
Fri Apr 4 11:50:45 UTC 2014


Hi.

Does anybody still use CD changer supported by cd(4) driver in FreeBSD, 
not ch(4)? Those changers have single drive, but report multiple LUNs 
with one LUN per CD slot.

One device like I have in my table is 17 year old. All devices I can 
find with Google or eBay are CD, not even DVD, and are parallel ATA or 
parallel SCSI. Is there anything relevant still on market?

I am asking this because code supporting that hardware in FreeBSD is 
heavily broken in head and stable/10 branches for several months now, 
and fix seems to be non-trivial. So my question is: does it worth 
bothering with rewrite, or we can just drop ~20KB of unused and quite 
complicated code? Dropping code does not mean those devices will be 
unusable, but only that _simultaneous_ access to different LUNs will 
become much slower due to inefficient scheduling of disk loads/unloads.

-- 
Alexander Motin


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