Topic: Wall Observer BTC/USD - Bitcoin price movement tracking & discussion - page 6601. (Read 26731481 times)

Custom raid controllers are bad. In my limited and unhappy experience, soft raid controllers (as found in some BIOSes) are also unreliable.

N+1 is bad, too! Apart from the ugly performance, when one disk fails, the others are not that far behind, which exposes you to data loss. Also, resilvering (rebuilding the mirror when a new disk replaces the dead one) takes forever and stresses the rest of the array.

The KISS principle says the "best" way to have effective redundancy in a "single" device is a simple 1+1 mirror. What I like about zfs is that it provides mirroring as a high level software service, so the hardware/controller thing becomes a non-issue. The disks and controllers are turned into a fungible commodity, which is where I aim to be.

I wouldn't mind her taking care of some of my data.

Technically he is doing disk duplexing: Two disks, two controllers, two channels.

I always found custom raid controllers to be the worst possible idea: Not only are you reliant on the N+1 disks, you're relying on the controller not blowing a hole in itself and sinking everything. Bonus if you can't get a new controller/same version. Super bonus fuckage if the controller stores all the disk information in its eeprom instead of on-disk.

Seriously, if you are counting on a single cheap NAS it's better to give your data to Bowsette....



She'll take care of it.

Mirroring?
If you're going to build from scratch, I advise you to consider XigmaNAS, open source based on FreeBSD. That zfs file system is the shit.

EDIT - The mainboard died on me once, it was an AsRock, a little brittle IME. I had to get a new one, hard to find. If it dies again, I'll rebuild with some other cheapish brand (Gigabyte likely). Advice: don't skimp on RAM. zfs likes it, and it's put to good use.

Only once I had to recover a disk, it was from another system that died (disk was good in itself). Format was UFS. Plugged it in... recognized in no time. Copied the data over to another, mirrored zfs pool, reformatted the old UFS disk - which is still working as one half of a different mirror now.

Re: NAS

I've got (and sent to the bin) quite a few of these (Iomega, thecus, etc.) over the years. I need to store data and backups on multiple physical locations reliably and I was quite excited when these home storage servers hit the market ~20yrs ago.

Since I have all data synched in multiple locations, the loss of one of those NAS servers was never catastrophic, but a MPITA and great annoyance nonetheless. Some are hooked up to synch via 10Mbit/s line, 5TB take a while* to synch over such a link. Except two of them all have died meanwhile the very same way they did on heslo (it doesn't even need to be a black- or brown-out, a simple shutdown can kill these buggers too, and yes it's always the mainboard never something easy to replace like the power supply..).

These NAS most often have very low-end CPU and I/O and I found you get way more bang for the buck with used professional servers. I am somewhat familiar with HP servers, but I guess it doesn't make a difference and I would not want to recommend them specifically, but that's just the brand I am used to - YMMV.

Currently I could buy a used/refurbished DL380 G8 48G RAM and 14x1TB for 887 EUR from my supplier. This looks to me like a good price compared to all these crap NAS. On top of a professional raid controller, it has more RAM than most NAS, redundant power supply and I never had such a server fail on me yet the way these NAS tend to very often. And if a part fails, you can actually get cheap replacement parts everywhere and fast, unlike these NAS that are pretty quickly discontinued and replaced and if you are lucky enough to get replacement parts they are overly expensive.

Now I understand that not everybody has a 19" rack in the basement (though these can be had very cheap too :-)) or even a separate room to place a loud beast like this in. Still, all these NAS products that I have had my hands on over the years totally and royally sucked and gave me a very bad price/performance ratio. Avoid them if you can, maybe build something yourself, load FreeNAS or whatever, everything is better than these shitty towers of future misery due to data loss.

Enough rant about NAS, BTC doesn't mind where you store it as long as you have a copy of the seed on paper 

* euphemism for many weeks

Great thanks!

Great suggestion, Hueristic, thanks. I already have Ublock Origins installed. Do I have to pick overlays on each site separately, or is there a catch-all option I haven't noticed?

On the one hand, I find this terrible; running RAID-less storage units.

On the other hand, you are duplicating NAS A onto NAS B at regular intervals.

My brain is beginning to cook just a little bit.

yeah I got rid of that one.  I have 2 of these.


https://www.newegg.com/synology-ds120j/p/N82E16822108637?

each has this hdd

https://www.newegg.com/gold-wd102kryz-10tb/p/N82E16822234399?


and I have one nas copy the other nas. they are a bit slow but they work more reliably the the 415 and there is the back up

I thought Denver would be nice but it’s an absolute shithole..
Crackheads everywhere and barred up bulletproof stores..
I almost want to say worse than Detroit..

You should be ok once you move the drives over to the new unit.

Haha this thread lately...you guys make me laugh. I'm nearly out.

Willy Woo
@woonomic
The growth in capital flowing into BTC is now equivalent to Apr 2017 of last cycle. The early bull phase is over, the main phase has started; it's come early.

Realised cap estimates the capital invested into #Bitcoin . Its slope = the rate of capital influx (as % of its cap).
https://twitter.com/woonomic/status/1343869638371774465?s=21


@woonomic
TOTAL INVESTED:
$170b - the total capital Bitcoin is storing at the price it was invested

INFLOWS:
$15b - During the re-accumulation phase of Mar - Oct
$50b - Since the October rally
$10b - In the last 7 days after @michael_saylor tweeted his $650m purchase was complete.

@woonomic
While the outside world is bewildered by the Bitcoin price rise, thinking it's probably a speculative bubble. Few understand with a blockchain we can measure the capital flows with precision and give answers instead of narratives.

@woonomic
This industry is putting metrics on capital flows previously unseen. 👏

Realised Cap was put forward by the @coinmetrics team, Entity-adjusted Realised Cap is an improvement by @glassnode filtering only for capital movement between different investor participants.

That is good to know! I may have to rely on that, thanks! PSU was the first thing I tested, seems to be fine and putting out the correct power, I'm 99.9% certain the mainboard is toast. Common issue with the Intel Atom CPU on that model apparently


What care or advice can you offer when switching the drives over? Just switch them over to the new NAS in the same order and boot it up then hope for the best? I'm hoping it will launch some sort of volume recovery process or something. Either that or it boots up like nothing happened but that's too much wishful thinking haha

Had the same issue last year, Synology does suck.  Careful when you transfer drives to new unit, too - they don't like being moved too much.

In case that fails, on first sight they seem to use pretty standard partition and raid formats and you should be able to recover the data from just the drives. ( for example https://www.synology.com/en-us/knowledgebase/DSM/tutorial/Storage/How_can_I_recover_data_from_my_DiskStation_using_a_PC )

edit: does "the NAS itself" exclude the powersupply? if not sure, you could try your old NAS+drives with the new powersupply, if compattible.

Well that was fun... Shut down my Synology NAS today to do some electrical work around the house. Powered it back on and was greeted with a flashing blue power light and not much else. Turns out the NAS itself has shat the bed and not the hard drives; common issue with the DS415+ apparently (not that that helps me much)

So now I've got to buy another NAS tomorrow and HOPE that my 24GB of data isn't all fucking gone when I plug the disks into the new NAS. If it is gone it isn't the end of the world (mostly TV shows and movies on it) but I've spent years collecting it all.

I know it's off topic but just had to rant. Told my wife and she wasn't too interested

On topic however... these last two days have been good consolidation I think. Things were getting a bit too heated, nice to catch our breaths a bit before the next leg up.

Hope everyone has a better day than I

Damn I would which I could work a bit better with computers

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