Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #286835

Re: Home server (Was: Re: Schrödinger's hash)

Show all headers | View raw

On 5/23/26 07:52, nwe wrote:
> On 5/23/26 12:44 AM, David Christensen wrote:
>> If you have a USB 3.x A or C port, various manufacturers make 2.5, 5, 
>> and 10 GbE (copper RJ-45) Ethernet adapters.  If you have a 
>> Thunderbolt 3, 4, or 5 port, a few make 10 and 25 Gbps SFPx fiber 
>> single and dual Ethernet adapters.
>
> I've looked at those, been thinking of trying it some time. The only 
> time I really wish for faster than 1g networking straight to my 
> workstation is when I'm cloning a complete hard drive to a backup image 
> file in the pool.


+1 for images, especially when they are encrypted and uncompressible.  I 
image my system drives monthly and keep the newest three.  The Linux and 
FreeBSD system images are deliberately small enough to fit onto "16 GB" 
devices (SD card, USB, SSD, or HDD).  This is plenty for the servers and 
maintenance/rescue live drives, but I sometimes want more for the 
workstation.  The worst are Windows machines with one drive and 
everything on it.


Another use-case for enterprise-speed Ethernet is ZFS replication.


> The only glitch I've run into so far is I've got to match the correct 
> optics to the cards, speaking of vendor-lock-in. Intel cards want intel 
> optics. Most other brands seem to accept most other brands optics. No 
> experience yet with Cisco brand. Dell can come as intel or other.


Thank you for the warning.


> Cheap managed network switches from aliexpress two 10g SFP+ ports plus 
> four 1g RJ45, I guess I got what I paid for. They seem to mostly work, I 
> had a few random failures along the way. I've read scare stories about 
> these potentially dialing home etc. I have not confirmed such. I suspect 
> these can't as I have them configured on an isolated vlan.
> 
> One wonderful network switch deal I find common on ebay: OS6450-P48 it 
> is cheap, 48 poe 1gig ports plus two 10g SFP ports that don't seem real 
> picky what brand optics I use. It is a bit technical to configure.


I switched to Ubiquitti Networks Unifi products several years ago when I 
got tired of logging in to multiple different web control panels and 
trying to keep all the network settings in sync.  "One web control panel 
to rule them all" is a killer feature that is worth paying for.  So, I 
look at their 2.5/5/10 Gbps switches periodically; but have not made a 
purchase (yet).


>> I have been using Intel SSD 520 Series 2.5" SATA III drives for many 
>> years.
>
> Same here, just discovered them cheap on ebay a few years ago. Some show 
> up with SMART reports indicating wear that would trigger me replacing a 
> consumer grade ssd. I've been using those nearly daily over 2 years with 
> no failures yet.


I bought my first Intel SSD 520 Series 60 GB 2.5" SATA III at Best Buy 
on Black Friday the year they came out.  I now have eight 60 GB drives 
plus eight 180 GB drives.  Many were bought used.  I agree that some of 
their SMART statistics can look scary, but the lowest 
Media_Wearout_Indicator VALUE for any of them is 95.  Using 180 GB 
drives as a ZFS special vdev with special_small_blocks and 24x7 in a 
lightly used SOHO server is slowly eating those drives.


>> How do you back up a 36 TB pool?
> 
> (blush)
> 
> I know my current backup scheme could someday bite:
> 
> 1. I have a full rsync backup on a spare R710 server in another 
> building. That server probably hasn't been powered up in 18 months. All 
> I need to do is go plug it into an outlet then spend a couple minutes at 
> a ssh session from the comfort of my office chair.
> 
> 2. The most critical files get regularly backed up (manually) to a 
> remote storage vps.
> I compress the files into an encrypted archive then upload using scp.
> 
> 3. Some random memory sticks and hard drives...
> 
> So I've got some coverage in case of disaster but it could use improvement.
> I know automatic backups could be nice but I just don't trust such.
> 
> I also have a clone of the server's boot drive.
> 
> nwe

I came to the conclusion that I needed a matching server for backups. 
So, I built one and replicate weekly.  It sounds like you could dust off 
the R710.  An enterprise-grade Ethernet connection between the primary 
and backup servers would encourage regular backups.


I also replicate to a near-site external disk weekly, and rotate that 
with an off-site disk bi-monthly.  Seagate says they make a 36 TB HDD, 
but I cannot find any for sale or in stock on the WWW.  An external RAID 
enclosure could reach that capacity with smaller drives, but external 
drive enclosures have failed me too many times over the years.


David

Back to linux.debian.user | Previous | Next — Previous in thread | Find similar

Thread

Schrödinger's hash Charles Curley <charlescurley@charlescurley.com> - 2026-05-22 18:00 +0200
  Re: Schrödinger's hash Andrew Latham <lathama@gmail.com> - 2026-05-22 18:10 +0200
    Re: Schrödinger's hash Charles Curley <charlescurley@charlescurley.com> - 2026-05-22 18:20 +0200
      Re: Schrödinger's hash Andrew Latham <lathama@gmail.com> - 2026-05-22 18:30 +0200
        Re: Schrödinger's hash Charles Curley <charlescurley@charlescurley.com> - 2026-05-22 19:00 +0200
    bad RAM (Was: Schrödinger's hash) nwe <nwe@gitcoding.net> - 2026-05-22 19:40 +0200
      Re: bad RAM (Was: Schrödinger's hash) Charles Curley <charlescurley@charlescurley.com> - 2026-05-22 22:10 +0200
        Re: bad RAM (Was: Schrödinger's hash) nwe <nwe@gitcoding.net> - 2026-05-22 22:30 +0200
          Re: bad RAM (Was: Schrödinger's hash) Charles Curley <charlescurley@charlescurley.com> - 2026-05-22 23:10 +0200
            Re: bad RAM (Was: Schrödinger's hash) nwe <nwe@gitcoding.net> - 2026-05-22 23:30 +0200
          Re: bad RAM (Was: Schrödinger's hash) David Christensen <dpchrist@holgerdanske.com> - 2026-05-23 02:00 +0200
            Re: bad RAM (Was: Schrödinger's  hash) Andy Smith <andy@strugglers.net> - 2026-05-25 13:20 +0200
              Re: bad RAM (Was: Schrödinger's hash) David Christensen <dpchrist@holgerdanske.com> - 2026-05-25 23:20 +0200
          Re: bad RAM Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2026-05-25 11:50 +0200
  Re: Schrödinger's hash The Wanderer <wanderer@fastmail.fm> - 2026-05-22 18:20 +0200
    Re: Schrödinger's hash Charles Curley <charlescurley@charlescurley.com> - 2026-05-22 19:10 +0200
  Re: Schrödinger's hash David Christensen <dpchrist@holgerdanske.com> - 2026-05-22 20:10 +0200
  Re: Schrödinger's hash Van Snyder <van.snyder@sbcglobal.net> - 2026-05-22 20:40 +0200
    Re: Schrödinger's hash nwe <nwe@gitcoding.net> - 2026-05-22 21:50 +0200
      Re: Schrödinger's hash David Christensen <dpchrist@holgerdanske.com> - 2026-05-23 01:30 +0200
        Re: Schrödinger's hash Van Snyder <van.snyder@sbcglobal.net> - 2026-05-23 01:40 +0200
        Re: Schrödinger's hash nwe <nwe@gitcoding.net> - 2026-05-23 02:20 +0200
          Re: Schrödinger's hash David Christensen <dpchrist@holgerdanske.com> - 2026-05-23 07:50 +0200
            Home server (Was: Re: Schrödinger's hash) nwe <nwe@gitcoding.net> - 2026-05-23 17:00 +0200
              Re: Home server (Was: Re: Schrödinger's hash) David Christensen <dpchrist@holgerdanske.com> - 2026-05-24 04:30 +0200

csiph-web