SAM-SD

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  What Is a SAM-SD?
  storage nas san file server das sam-sd open storage • • scottalanmiller

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  @Dashrender said: Let's talk about the actual storage you choose for these machines. Can be a lot of things: local drives, OEM drives, non-OEM drives, FusionIO cards, Winchester drives, SSD, hybrid arrays, DAS attached chassis... because it is an approach and not a product it is very flexible.
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  Battery Backup with SSD raid
  storage raid ssd • • Donahue

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  @scottalanmiller said in Battery Backup with SSD raid: @pete-s said in Battery Backup with SSD raid: @scottalanmiller said in Battery Backup with SSD raid: @pete-s said in Battery Backup with SSD raid: @scottalanmiller said in Battery Backup with SSD raid: SSD NV protection is to allow the SSD's cache to flush safely should power be lost. RAID NV / battery protection is to allow the RAID's cache to flush safely should power be lost. Each is important on its own, neither covers for the other one. That's technically slightly incorrect. The non-volatile cache memory on the raid controller is to be preserve the data that has not yet been written to the drives, until power is restored again. On the SSD the capacitors hold enough charge so that the drive can write the remaining data in the cache memory to the actual flash memory after the power is gone. The cache is DRAM so it will loose it's contents after a few seconds. The only time details like this matter is if you remove the battery from a raid card, your data might be lost. I'm missing how that is different than what I said. What you said is correct, but I feel like you just reworded what I said, with the added detail that the RAID card flush is not until power is restored, which one hopes is obvious. Sorry Scott, you're right. I was just thrown off by you said "SSD NV protection" and because you worded both thing the same. Obviously both things are to protect from data loss at power failures. OIC, you are saying that the SSD is volatile, but has a battery in most cases? makes sense. Almost, let me explain. Below is a picture of an Samsung enterprise SSD, SM863. The SSD controller (yellow) is the brain. The flash memory (green cross) is non-volatile so it will not suffer data loss without power. There are also more flash memory on the backside. The cache memory however is the blue ring and it will lose it's memory as soon as the power is removed. It's the same type as the memory in your computer, DRAM. That would cause immediate data loss and that is not good and that is why enterprise drives have a lot of capacitors (red circles). The capacitors (red) act like small rechargeable batteries. When the drive loses it's external power these small capacitors will work as a reserve power for the entire drive. The controller (yellow) knows that it has lost external power so it will quickly write the data from the cache memory (blue) to the flash memory (green) before the reserve power from the capacitors (red) are empty. That way data loss is prevented. This will only take a couple of seconds at most.
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  Pi just boot with a new SD Card after failure
  • davefollmers

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  Most SD cards are not designed with running an OS in mind. The log files and swap when needed severally impact their life span. If it's just this one Pi, then you might want to try replacing the Pi as well.
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  File Server Upgrade Options
  • larsen161

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  @larsen161 said in File Server Upgrade Options: @scottalanmiller this would be an smb share. video content being edited by a team of editors Seems like Gluster would be the approach to take, then.
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  Linux OS advice for building a SAM-SD
  • magicmarker

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  @magicmarker said in Linux OS advice for building a SAM-SD: @scottalanmiller Thanks for you insight Scott. You make great points. I will stick with a Fedora or Centos OS with the NFS package instead after reading your comments. That is the slap in the face I needed. LOL. It's certainly nothing against DietPi. And if you are running ON a Raspberry Pi, I'd certainly think trying that out would make sense (where it is a production release already.) RP is a very different animal from server hardware, so different needs, different sensible tunings and so forth. For the needs of a normal RP deployment, DP sounds like a good starting point. I've not played with it, so can't endorse it, but it looks perfectly fine for that.
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  Advice on building "storage servers" with two DL380 G7 servers
  storage backup file server proliant dl380 g7 secondary storage • • Shuey

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  @shuey said in Advice on building "storage servers" with two DL380 G7 servers: The CDW rep said: "Is it apple to apples or did xbyte use third party memory and drives? We are dell's largest partner so it should not be a large difference if truly apples to apples." CDW might be the largest, but they aren't known for passing along good pricing, being very honest and they only deal in new, not refurb. So it is expected that their prices will be way higher. xByte will use non-Dell parts, but keeps them under warranty. So it remains apples to apples. CDW is just panicking because they want the sale.
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  Installing Gluster on CentOS 7
  linux storage scale centos scale hc3 centos 7 rhel rhel 7 filesystem gluster scale out storage glusterfs • • scottalanmiller

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  @scottalanmiller Thanks for this post and answering all my questions. @travisdh1 Thanks for answering all my questions as well. Good Thread!
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  Project: Home/SMB NAS Setup -- Need ur advice
  • markl

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  Virtual. And I think I mentioned that buried in one of my posts about it. Or maybe it was the other thread that this split off of. KVM, Xen or Hyper-V all work great here. Physical wouldn't be horrible, but no need for it.
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  To ZFS or not to ZFS... that is my question.
  • markl

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  @markl said in To ZFS or not to ZFS... that is my question.: @scottalanmiller So let's get specific, here's my next post: My Home NAS I'm on it
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  Hardware Design for SAM-DR Small Rackmount Backup Device
  storage backup raid server disaster recovery sam-sd dell poweredge perc h710 sam-dr dell poweredge r320 • • scottalanmiller

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  @JaredBusch said in Hardware Design for SAM-DR Small Rackmount Backup Device: @matteo-nunziati said in Hardware Design for SAM-DR Small Rackmount Backup Device: @scottalanmiller just a question (sw not hw) why veeam rather than say.. altaro. Just curious! There is no backup software on this device. It is a storage target. One assumes that @scottalanmiller will be using some base OS that lets you setup basically any type of connectivity. Ok! Got it wrong! Thanks for clarifying
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  SAM-SD Hardware Server Vendors
  storage dell hpe servers supermicro sam-sd huawei • • scottalanmiller

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  @DustinB3403 said in SAM-SD Hardware Server Vendors: @scottalanmiller is there a ballpark entry price for SAM-SD hardware? Are you approving all of all the systems designed? Or did you simply license the term (like Trump) licenses his name? Prices will be available soon. It's full support, real support unlike SMB devices. So not super cheap
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  What is considered 'cheap hw raid' vs 'good hw raid'
  • momurda

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  @momurda From my experience, you are correct about the fake raid terminology. Fake RAID = is the raid you do on the chip-set level without any dedicated card doing the works, but it fools the operating system that gets installed on-top of it, and does not require any special config from the OS side. I think you can do fake raid for RAID 1 for important workstations like the HR computers for example. Software raid = is like mdadm in Linux or Windows 10 storage spaces, it relies on the OS side for everything. Read RAID or Hardware RAID is getting a good RAID card.
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  Open Storage Operating Systems for SAM-SD
  linux windows centos ubuntu freebsd opensuse solaris operating systems sam-sd openindiana • • scottalanmiller

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  @matteo-nunziati said in Open Storage Operating Systems for SAM-SD: what a mess... Windows desktops are loaded with software that you are only limited as to how you can use it by EULA as well.
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  FreeNAS vs Hardware NAS
  storage nas freebsd file server freenas • • IT-ADMIN

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  Looping back to this, in the past month I've worked with three different companies that all experienced significant data loss or downtime because of their choice of FreeNAS. Two suffered from not having front loaded their engineering and had an inability to support their servers during routine operations and caused major outages because of it along with significant cost for repairs, and one company that lost its data because of unnecessary bugs in the FreeNAS GUI code that would have been avoided has they been simply on FreeBSD. Additionally this past week FreeNAS 10 "Coral" was demonstrated to be so incredibly unstable a month after being released that they had to recall the release and revert to a "beta" status indefinitely. For a trivial end user application this would be bad, for a critical storage infrastructure component on which companies need to have rock solid faith, it's unthinkable.
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  FreeNAS Gets Hit by the Jurassic Park Effect
  storage nas freebsd san freenas jurassic park effect sam-sd blog freenas coral • • scottalanmiller

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  @scottalanmiller said in FreeNAS Gets Hit by the Jurassic Park Effect: HCL Yes, agreed!
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  Where the SAM-SD Concept Originated
  storage scott alan miller nas article nfs sam-sd sam-sd blog proliant dl585 g2 • • scottalanmiller

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  The SAM-SD Model 01
  storage scott alan miller nas san article sam-sd sam-sd blog proliant dl185 g5 unified storage • • scottalanmiller

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  Is this the right place to troll SAM?
  • AshleyJR

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  @scottalanmiller said in Is this the right place to troll SAM?: @AshleyJR said in Is this the right place to troll SAM?: @scottalanmiller I have to say Scott I haven't seen any interesting conversations going on here yet. You promised me arguments Sorry, what about the guy claiming that Linux is an OS? It isn't, FFS what do I have installed?
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  ZFS Based Storage for Medium VMWare Workload
  storage virtualization raid zfs filesystems • • donaldlandru

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  I would recommend looking at StarWind SA for example. That solution fits your requirements perfectly, it will also provide you with HA storage that will ensure the business continuity. As for support, they offer a single point of contact no matter what issue you face, plus the system will be shipped to your site fully preconfigured and pretested.
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  XenServer - RAID - Home Lab
  storage virtualization xenserver raid xen software raid hardware raid md raid fakeraid • • aaronstuder

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  @anonymous said: Does anyone make a cheap raid card? Inexpensive raid card no. Inexpensive HBA card, yes.
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  Configuration for Open Source Operating systems with the SAM-SD Approach
  • GotiTServicesInc

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  @GotiTServicesInc said: and if we're forced to do Lan, we should be able to trunk some ports together to get higher throughput no? Yes, you would likely use 10GigE connections too, since no switch is required.
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  Samba problem
  linux samba network storage • • stacksofplates

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  @johnhooks said: So I figured it out. Just like most every other problem I've had, it was something stupid I did. I initially started with a user "john" and set up permissions but decided later to use "jhooks". I had accessed the shares with the "john" username first and that's why some worked. I never added the jhooks username to samba (must have forgot since some shares were working) and that's why I couldn't log into the other shares with that username. That will teach me to try to do this stuff on Friday night when I'm tired. Well worse things have happened, it could've been a client outage
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  Just spit-balling here....
  • DustinB3403

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  @PSX_Defector said: @Dashrender said: @PSX_Defector said: We just bought four new blades with 1TB of RAM. And we buy tons of equipment all the time. Ain't nobody got time to put in RAM! They pay you to much to even install the blade, let alone the RAM on the blade. Well, someone gotta put it in. And that's the smarthands in the DC. exactly - again you cost to much to do that work... I'm salary - and sure, while my time could be spent better doing other things, I'll take my own prerogative in these rare cases of getting new hardware
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  NAS | SMB IT Journal
  • DustinB3403

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