StorageGRID SG6160 compute node is in unknown state

• Compute Node status is unknown in GridManager UI and alert reports :  Unable to communicate with node

• Unable to access or ping node IP or BMC management port

• miscd.latest.log shows PCI and I/O stalls, delays up to 70-93 seconds, and Mellanox PCIe query failures

[2026-08-29T22:03:31.010] jmxMetricsWrapper -    INFO -- Fresh cassandra results generated - timings were 14, 0, 5, 2 for a grand total of 21
[2026-08-29T22:05:15.097]    pciErrMon -    INFO -- PCI error stats updated in 69.51416015625 sec with 2 records
[2026-08-29T22:05:16.283]   ioTracking -    INFO -- IO tracking stats updated in 79.55502414703369 sec
[2026-08-29T22:05:44.338] CassandraDataStoreSizeMonitor -   DEBUG -- Getting latest Cassandra data-store size
[2026-08-29T22:05:44.499] CassandraDataStoreSizeMonitor -   DEBUG -- Successfully updated Cassandra data-store size: 2492238747366
[2026-08-29T22:05:52.242] jmxMetricsWrapper -    INFO -- Fresh cassandra results generated - timings were 14, 1, 4, 2 for a grand total of 21
[2026-08-29T22:07:27.492]    pciErrMon -    INFO -- PCI error stats updated in 72.35965657234192 sec with 2 records
[2026-08-29T22:07:34.627]   ioTracking -    INFO -- IO tracking stats updated in 78.32447600364685 sec
[2026-08-29T22:08:13.050] jmxMetricsWrapper -    INFO -- Fresh cassandra results generated - timings were 14, 0, 5, 2 for a grand total of 21
[2026-08-29T22:09:44.905]    pciErrMon -    INFO -- PCI error stats updated in 77.38243913650513 sec with 2 records
[2026-08-29T22:09:52.950]   ioTracking -    INFO -- IO tracking stats updated in 78.299569606781 sec
[2026-08-29T22:10:34.242] jmxMetricsWrapper -    INFO -- Fresh cassandra results generated - timings were 14, 0, 5, 2 for a grand total of 21