Dear cephers, We have a series of devices that mount several SATA disks via an external cabinet. These disks have 4 paths managed by multipath. (local disks about 20 work perfectly) cephosd23:~ # multipath -ll mpathe (35000c500d88657e3) dm-30 LENOVO-X,ST14000NM004J size=13T features='0' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 2:0:9:0 sdae 65:224 active ready running |-+- policy='service-time 0' prio=1 status=enabled | `- 2:0:21:0 sdap 66:144 active ready running |-+- policy='service-time 0' prio=1 status=enabled | `- 2:0:33:0 sdba 67:64 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 2:0:45:0 sdbl 67:240 active ready running mpathd (35000c500d886ac87) dm-23 LENOVO-X,ST14000NM004J size=13T features='0' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 2:0:2:0 sdx 65:112 active ready running |-+- policy='service-time 0' prio=1 status=enabled | `- 2:0:14:0 sdai 66:32 active ready running |-+- policy='service-time 0' prio=1 status=enabled | `- 2:0:26:0 sdat 66:208 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 2:0:38:0 sdbe 67:128 active ready running mpathc (35000c500d87a5c5f) dm-20 LENOVO-X,ST14000NM004J The disks are accessible from the server, but Ceph has not been able to mount them and they are not accessible from Ceph. ... tmpfs 126G 0 126G 0% /var/lib/ceph/osd/ceph-110 tmpfs 126G 0 126G 0% /var/lib/ceph/osd/ceph-113 tmpfs 126G 0 126G 0% /var/lib/ceph/osd/ceph-112 the directory is empty and of course: /usr/bin/ceph-osd -f --cluster ceph --id 110 --setuser ceph --setgroup ceph 2025-02-27T15:22:25.833+0100 7f799db60d80 -1 auth: unable to find a keyring on /var/lib/ceph/osd/ceph-110/keyring: (2) No such file or directory 2025-02-27T15:22:25.833+0100 7f799db60d80 -1 AuthRegistry(0x55841ec96940) no keyring found at /var/lib/ceph/osd/ceph-110/keyring, disabling cephx 2025-02-27T15:22:25.833+0100 7f799db60d80 -1 auth: unable to find a keyring on /var/lib/ceph/osd/ceph-110/keyring: (2) No such file or directory 2025-02-27T15:22:25.833+0100 7f799db60d80 -1 AuthRegistry(0x7ffd668863a0) no keyring found at /var/lib/ceph/osd/ceph-110/keyring, disabling cephx Is there any way to fix this error and mount them again? The data should be intact. Best regards -- ================================================================ Ibán Cabrillo Bartolomé Instituto de Física de Cantabria (IFCA-CSIC) Santander, Spain Tel: +34942200969/+34669930421 Responsible for advanced computing service (RSC) ========================================================================================= ========================================================================================= All our suppliers must know and accept IFCA policy available at: https://confluence.ifca.es/display/IC/Information+Security+Policy+for+Extern... ==========================================================================================