• RE: When Does It Stop Even Being IT: Buyers vs Doers

    The reality is that even an automotive engineer would still go through the same buying process because:

    1. It’s how the channel works.
    2. Someone who designs automotive chassis isn’t going to track who has the most cup holders of the smoothest ride.

    A SE still has value even with a hardened IT engineer as an SE ca. Provide insight into a niche said practitioner doesn’t spend 40 hours a week on.

    posted in IT Discussion
  • RE: Router/firewall recommendations for small branch office

    @JaredBusch said in Router/firewall recommendations for small branch office:

    If you network is down to outside factors you don’t get in trouble for 911 calls not completing. That has never been a thing. POTS goes down all the time.

    In theory POTS is more reliable for 911 address lookup. In reality if I'm calling 911 in an office it's likely going to be from my cell phone assuming service.

    Nothing stops you from getting a SIM card modem backup for the PBX, or for IP using a SD-WAN solution that bridges in cellular networks to cover normal circuit outages.

    posted in IT Discussion
  • RE: Internet connection sharing

    @RojoLoco said in Internet connection sharing:

    I can't imagine Comcast allowing this, even on a biz class connection. And I feel like asking them about it would raise a huge red flag.

    At worst. If you change for it, you likely become legally a telecom provider. Get ready for weird tax’s, logging requirements.

    At best, get ready for the other business to get malware, and Comcast’s abuse department shutting down your connection, or the FBI knocking on your door when someone gets involved In something sketchy...

    posted in IT Discussion
  • RE: Dell PERC H740 with SSDs?

    @Pete-S said in Dell PERC H740 with SSDs?:

    Only go with HDDs when you don't have any other choice. SSDs will be much faster. A single SSD has IOPs in the several tens of thousands range while a HDD can only do a couple of hundred.

    The ultra low end .1DWPD drives can have terrible sustained write latency. I'm not convinced spinning drives might win in this category.

    Read intensive SATA SSDs are getting close to the same price as 10K SAS. If you want to save money don't buy SAS SSDs, because you don't need them.

    The cheap ones fall over once you exceed the limited SLC or DRAM buffer. Beware using these for large DB copy jobs etc.

    If you want to save even more money don't buy drives from Dell

    This is... problematic. I've seen a server OEM run into an issue between their HBA/RAID controller nad a given drive, and get the firmware patch only released for their make/model of the drives, and not the general-purpose regular ones. Also, good luck getting the out of band to properly provide SMART. Also unless you are buying something that someone validated, good luck with HotAdd support, or having to use one-off solutions like Intel VMD when doing a pass through drives.

    For SSDs look for Samsung and Intel enterprise drives

    Going to point out that Intel shares fabs with Micron.

    Samsung PM883 or Intel S4510 in your case

    Ehhh, be careful here. The PM8xx is the bargain basement cheap Samsung SATA devices. Samsung in the earlier versions of this series had some... interesting firmware bugs so make sure you patch your drives.

    The Intel 4510 with newer firmware should work around the previous performance problems on the last generation of these (The S37xx was a nightmare on low QD writes), but again, this isn't the fast drive. This is the cheaper one. You normally have something act as a write buffer to shield these drives from aggressive writes.

    posted in IT Discussion
  • RE: Dell PERC H740 with SSDs?

    @Pete-S said in Dell PERC H740 with SSDs?:

    I think not. The H330 (LSI SAS 3008 controller) will push hundreds of thousands of IOPs. The bottleneck will be your SSDs.

    The H330 is the crap HBA that has a cut-down queue depth. If memory serves, it's maximum queue depth is equal to a single SAS drive (256 commands). It's still better than the garbage tier H300 from the last generation.

    The HBA 330 is the version that has full queue depth.
    Note, for high-performance setups, going all NVMe is easier (no need for an HBA).

    posted in IT Discussion
  • RE: RAID rebuild times 16TB drive

    @biggen said in RAID rebuild times 16TB drive:

    I guess I was skeptical I had correct what @Pete-S said because I've seen so many reports that its taken days/weeks to rebuild [insert whatever size] TB Raid 6 arrays in the past. But I guess that was because those systems weren't just idle. There was still IOPS on those arrays AND a possible CPU/cache bottleneck.

    Was the drive full? Smarter new RAID rebuild systems don't rebuild empty LBAs. Every enterprise storage array system has done this with rebuilds for the last 20 years...

    posted in IT Discussion
  • RE: RAID rebuild times 16TB drive

    @scottalanmiller said in RAID rebuild times 16TB drive:

    Even on bare metal, we normally see a lot of bottlenecks. But normally because almost no one can make their arrays go idle during a rebuild cycle. If they could, they'd not need the rebuild in the first place, typically.

    Our engineers put in a default "reserve 80% of max throughput for production" IO schedular QoS system, so at saturation rebuilds only get 20% so they don't murder production IO. (note rebuilds can use 100% if the bandwidth is there for the taking).

    posted in IT Discussion
  • RE: RAID rebuild times 16TB drive

    @scottalanmiller said in RAID rebuild times 16TB drive:

    Its a system, not an IO, bottleneck typically. Especially with RAID 6. Its math that runs on a single thread.

    Distributed storage systems with per object raid FTW here. If I have every VMDK running it's own rebuild process (vSAN) or every individual LUN/CPG (how Compellent or 3PAR do it) then a given drive failing is a giant party across all of the drives in the cluster/system. (Also how the fancy erasure code array systems run this).

    posted in IT Discussion
  • RE: What Are You Doing Right Now

    @bnrstnr said in What Are You Doing Right Now:

    Laptop shopping... Why are ASUS laptops so much cheaper than Dell/HP?? Anybody have a higher end model (ZenBook, VivoBook, ProArt) to compare?

    If my mac has something wrong with it, I just have Apple send someone to the house to fix it. Can't get that with ASUS.

    posted in Water Closet
  • RE: Reconsidering ProxMox

    @black3dynamite said in Reconsidering ProxMox:

    It’s supports multiple storage types like nfs or cifs

    Obligatory - https://blog.fosketts.net/2012/02/16/cifs-smb/

    (Saying CIFS is my pet peeve).

    posted in IT Discussion