February 19, 201511 yr Hello...I am experience just random drive disappearance and drive smart faults. It's just confusing me. I have 16 drives total, parity, cache, the rest are data. I have a motherboard with 6 SATA ports (Parity-sdf), 2-SATA port card (sdg-sdh), an 8-port SAS expander card (sdi-sdo, cache). Sometimes when I go on the dashboard, the drives will disappear. I will have to reboot the system for them to reappear. I wonder if it is just the nature of my components because I am using the combination of the motherboard, 2-port car, and the expander card that is causing inconsistent operation. Should I just purchase another expander card and move all my drives onto it? Please advise.
February 19, 201511 yr Community Expert What power supply are you using? I have seen random drive disappearances when a system is under-powered for the number of drives attached.
February 19, 201511 yr What power supply are you using? I have seen random drive disappearances when a system is under-powered for the number of drives attached. I agree, the first thing i would check is the power supply
February 21, 201511 yr Author System: MSI - 880GMS-E41(FX) (MS-7641) CPU: AMD FX-6300 Six-Core @ 3500 Cache: 288 kB, 6144 kB, 8192 kB Memory: 16384 MB (max. installable capacity 8 GB) Network: eth0: 1000Mb/s - Full Duplex Kernel: Linux 3.18.5-unRAID x86_64 OpenSSL: 1.0.1k PSU is a Corsair HX850 syslog.zip
February 21, 201511 yr Did a hard drive drop during that syslog (Feb 18 21:14 - Feb 20 18:10)? Nothing is showing in the syslog indicating any failure at all? Wait until a drive drops out and then post another syslog before you reboot the server. That power supply should have no problems with the number of drives.
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