Recent content by danswartz

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    Fan noise reduction on a Supermicro SC826

    1. It's a 2U JBOD, so 80x80 is the only option. 2. There really isn't anywhere convenient to screw things to. The PWM controller seems to work fine, so I think I'm gonna declare victory :)
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    Fan noise reduction on a Supermicro SC826

    So, my new JBOD has 3 80x80x38 fans mid-chassis. Run either at 7000RPM (full) or 3600RPM (optimum). The former is jet plane annoying. The latter is just loud enough to be irritating (my lab is in a corner of the family room downstairs.) I got a couple of noctua fans, but they don't fit in...
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    Windows XP to a scientific instrument in a VM?

    I knew a guy at a relatively small company years ago. He had an old DOS program that communicated with some custom hardware over a serial line. The original (386) PC was having issues. IIRC, the memory was getting flaky, and finding replacement memory even on ebay was problematic (and/or...
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    Error when copying files over 2gb

    Can you plug it into a sata port on a desktop and try your repro? That would at least tell if the drive is bad?
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    need help badly with raid5 recovery

    I remember reading about a medium/small company that religiously backed up their business stuff to tape (this was some years ago). No IT person (of course), so some random bro was doing it. Whoever set up the tape HW/SW hadn't tested properly, and the tape backups were garbage. Then, they had...
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    Linux SCSI messages - cause for concern?

    what i was afraid of. time to see if the buyer will take a return :) thanks!
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    Linux SCSI messages - cause for concern?

    I got a ZeusRAM off ebay to use as SLOG in my dual-head ZFS server. It seems to be working fine, except every 5 minutes, I see messages like these: Jan 17 11:53:00 centos-vsa2 kernel: sd 33:0:1:0: [sdf] tag#0 Sense Key : Recovered Error [current] Jan 17 11:53:00 centos-vsa2 kernel: sd...
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    Proxmox VE vs VMWARE ESXi for Windows 10 VM

    Runs fine with 8GB. Hasn't described his requirements, really...
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    SCSI-3 persistent reservations and SAS NL disks?

    There isn't a vendor, per-se. This is for a home lab. It's a ZFS cluster serving NFS to vsphere. I was following ewwhite's blog post on this. Seems to work fine, except for the spinners not cooperating...
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    SCSI-3 persistent reservations and SAS NL disks?

    Thanks for the info! Very strange, as the ZeusRAM is on the same controller (literally in the same jbod), and it *seems* to work. At the moment, I am using fence_vmware_soap, since these are virtualized storage appliances. I wanted to use fence_vmware_rest, but the CentOS 7 implementation...
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    Proxmox VE vs VMWARE ESXi for Windows 10 VM

    ZFS on linux is perfectly usable at this point for an all in one.
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    SCSI-3 persistent reservations and SAS NL disks?

    So I'm trying to stand up a pacemaker cluster. Back-end is a SM 826 JBOD. Storage is existing 7200 RPM 1TB Constellation spinners. I wanted to use SCSI fencing, but when I enter the command, giving the 8 drives, I get this: [ 2020-01-12 15:34:56,313 ERROR: Cannot get registration keys ]...
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    Virtualization and ZFS

    I think I'm stuck. Got the physical CC node setup, as well as the two virtual storage appliances. It looks as if the CC unit needs to access the storage subnet? This is not possible for me, as it is a 50gb mellanox link directly between the two vsphere hosts. I had thought the CC would send...
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    Virtualization and ZFS

    Ah, okay, that makes sense. Thanks! I was wondering how the control VM would avoid crashing/hanging if the host it was running on got borked along with the storage appliance on that same host. Fortunately, I have a low-power sandy bridge host in a micro-atx case I can deploy as the control...
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