[CentOS] CentOS 7, Xeon CPUs, not booting

This is happening on anything other than plain vanilla Dell servers. One 
R730, with dual Tesla cards, one R420, with a fibre card for a RAID
device, it never switches root. All these systems have Xeons, not AMD
CPUs.

We've had this with every one of the 327 kernels. In addition, it seems to
happen also with the 229.20.1; the 229.14.1 has no such problem.

>From the rdsosreport:
starting at line 126:
/dev/disk/by-label:
total 0
lrwxrwxrwx 1 root 0 10 Jan 27 19:03 SWAP -> ../../sda2
lrwxrwxrwx 1 root 0 10 Jan 27 19:03 \x2f -> ../../sda3
lrwxrwxrwx 1 root 0 10 Jan 27 19:03 \x2fboot -> ../../sda1

Then, starting at line 1283:
[    3.317027] <servername> systemd[1]: Found device ST500NM0003-9ZM172 /.
[    3.317974] <servername> systemd[1]: Starting File System Check on
/dev/disk/by-label/\x2f...
[    3.320089] <servername> systemd-fsck[590]: Failed to detect device
/dev/disk/by-label//
[    3.320567] <servername> systemd[1]: systemd-fsck-root.service: main
process exited, code=exited, status=1/FAILURE
[    3.320972] <servername> systemd[1]: Failed to start File System Check
on /dev/disk/by-label/\x2f.

Does *ANYONE* have any clues as to what's going on?

Meanwhile, on a plain vanilla Dell R420, I see:
ll /dev/disk/by-label/
total 0
lrwxrwxrwx. 1 root root 10 Feb 17 10:06 SWAP -> ../../sda2
lrwxrwxrwx. 1 root root 10 Feb 17 10:06 boot -> ../../sda1
lrwxrwxrwx. 1 root root 10 Feb 17 10:06 root -> ../../sda3

So, what is this by-label with the x2f, and why can't it find the drives?

Or do I have to file a bug report? This is a true show-stopper.

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