Unsolved
2 Posts
0
2447
SDC can't see mapped volumes
Hi,
I have a ScaleIO cluster comprising of 5 servers. 4 are both SDSs and SDCs while the fifth is just a SDC. Three of the SDSs are also the MDMs/tiebreaker.
The SDS's are all running Centos 7.5, while the SDC only server is Redhat 7.5. I'm using ScaleIO 2.6.
The install went smoothly and all appeared fine until I tried to map volumes to the SDCs.
Regardless of how many volumes I map, only one appears on the SDC. If I try to format that one disk, I get IO errors.
The MDM can communicate with the SDCes.
# scli --query_all_sdc
MDM restricted SDC mode: none
Query all SDC returned 5 SDC nodes.
SDC ID: eb9d967900000000 Name: ulpjnk011SDC IP: 10.138.144.232 State: Connected GUID: 8C07F5EA-20B9-486C-9364-113D6 F52F853 OS Type: LINUX Loaded Version: 2.6.0 Installed Version: 2.6.0
Read bandwidth: 0 IOPS 0 Bytes per-second
Write bandwidth: 0 IOPS 0 Bytes per-second
SDC ID: eb9d967a00000001 Name: ulzosp103SDC IP: 10.138.79.5 State: Connected GUID: E946D9AD-7D98-4091-8346-B3C50878 8699 OS Type: LINUX Loaded Version: 2.6.0 Installed Version: 2.6.0
Read bandwidth: 0 IOPS 0 Bytes per-second
Write bandwidth: 0 IOPS 0 Bytes per-second
SDC ID: eb9d967b00000002 Name: ulzosp102SDC IP: 10.138.79.4 State: Connected GUID: 7662ABA1-F768-4FD2-ACD4-44DFBACA CA63 OS Type: LINUX Loaded Version: 2.6.0 Installed Version: 2.6.0
Read bandwidth: 0 IOPS 0 Bytes per-second
Write bandwidth: 0 IOPS 0 Bytes per-second
SDC ID: eb9d967c00000003 Name: ulzosp101SDC IP: 10.138.79.3 State: Connected GUID: 1D417F6D-E081-488C-8605-1E1A0443 A5AD OS Type: LINUX Loaded Version: 2.6.0 Installed Version: 2.6.0
Read bandwidth: 0 IOPS 0 Bytes per-second
Write bandwidth: 0 IOPS 0 Bytes per-second
SDC ID: eb9d967d00000004 Name: ulzosp001SDC IP: 10.138.79.2 State: Connected GUID: F21C9D2A-CFF6-4932-B4DE-5DB12547 D9A7 OS Type: LINUX Loaded Version: 2.6.0 Installed Version: 2.6.0
Read bandwidth: 0 IOPS 0 Bytes per-second
Write bandwidth: 0 IOPS 0 Bytes per-second
The SDC;s can communicate with the MDM.
# /opt/emc/scaleio/sdc/bin/drv_cfg --query_mdms
Retrieved 1 mdm(s)
MDM-ID 38a7827d0fd3cb25 SDC ID eb9d967900000000 INSTALLATION ID 51f1f2d20d82def5 IPs [0]-10.138.79.3 [1]-10.138.79.4
However, the SDC's can't see any volumes.
# /opt/emc/scaleio/sdc/bin/drv_cfg --query_vols
Retrieved 0 volume(s)
There are currently three volumes mapped to this SDC.
I've seen a lot of comments saying things like these are caused by the network, but all network communication seems ok. I can telnet to the MDM and SDS ports.
What could cause this?
chi_sox
19 Posts
0
July 23rd, 2018 08:00
See the workaround noted in following KB. This will be fixed in 2.6.1.
https://emcservice--c.na55.visual.force.com/apex/KB_BreakFix_clone?id=kA2f100000007Vx
walker01
2 Posts
0
July 23rd, 2018 16:00
Thanks for the reply. Unfortunately I can't open the link you gave me. It takes me to Dell's Support home page.
I ended up fixing this by downgrading the kernel on the SDCs from 3.10.0-862 to 3.10.0-514. I also tried 3.10.0-613, but it didn't work either.