01-14-2020 07:25 AM
Solved! Go to Solution.
01-14-2020 12:23 PM - edited 01-14-2020 12:32 PM
SAN troubleshooting is a bit out of this forums comfort zone.
if you have C3 discards, it's bad. I recommend requesting help from a experienced SAN admin to troubleshoot the issue. You can have perfectly working hardware and C3 discards at the same time. A C3 discard is basically a frame that get thrown away during transmission, and since Fibre Channel is designed as a lossless protocol this is bad.Likely you are looking into more than just one error to eliminate the C3 discards. Many small streams make big river
Small Advice from me:
Make sure all devices are at the same speed (2,4,8,16,32GB)
Zone one hba to one tape drive, do not zone one HBA to all tape drives in one zone.
One HBA to 1-2 tape drives at the most, tape drives are fast than you think when applying build-in compression.
Best Regards
Nicolai
01-14-2020 12:23 PM - edited 01-14-2020 12:32 PM
SAN troubleshooting is a bit out of this forums comfort zone.
if you have C3 discards, it's bad. I recommend requesting help from a experienced SAN admin to troubleshoot the issue. You can have perfectly working hardware and C3 discards at the same time. A C3 discard is basically a frame that get thrown away during transmission, and since Fibre Channel is designed as a lossless protocol this is bad.Likely you are looking into more than just one error to eliminate the C3 discards. Many small streams make big river
Small Advice from me:
Make sure all devices are at the same speed (2,4,8,16,32GB)
Zone one hba to one tape drive, do not zone one HBA to all tape drives in one zone.
One HBA to 1-2 tape drives at the most, tape drives are fast than you think when applying build-in compression.
Best Regards
Nicolai