Linux host loses LUN paths with blk_cloned_rq_check_limits error
Applies to
- AFF-A800
- ONTAP 9.6
- ONTAP 9.7
- Fibre Channel (FC) LUNs
- RedHat Enterprise Linux (RHEL) 7.6
- RedHat Enterprise Linux (RHEL) 7.7
- Linux Unified Host Utilities 7.1
Issue
RHEL 7.6 hosts loses paths to LUNs logging the following multipath error:
kernel:blk_cloned_rq_check_limits: over max size limit
Storage VPD advertised transfer length is different to what host is using:
#sg_vpd -p /dev/sda
ONTAP:
scsit_lu_1: scsiblade.invalid.xfer.len:notice]: Host type sent command opcode 0x2a with a transfer length of bytes, which exceeds the maximum of 1MB on LUN