Github user sureshanaparti commented on the issue:
https://github.com/apache/cloudstack/pull/1953
@remibergsma The KVM support for max data volumes 32 was updated in the DB
as part of CLOUDSTACK-8992 (PR #980). CloudStack supports till device Id 15,
without this changes. Might be the limit 32 was tested manually in the VM. As
you pointed, in KVM, I see there is a problem with the device name after device
id 25. As soon as the device name ends with suffix 'z' for device id 25, it
should take the next suffix 'aa', 'ab',...so on. I think it is better to
improve the code to generate a valid device name suffix with the given device
id. As this is specific to KVM, I'll create a separate PR with these changes.
Thanks.
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