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The first one, friendshops852, does the shipping scam that I described previously (as does the last, 4seasonstores). The middle one, ouyou2010, is actually in Hong Kong, not mainland China, and they do not scam, as far as I know. For some reason the unscrupulous sellers seem much more prevalent...

If you read what I wrote, you would see that I was talking specifically about unscrupulous China sellers. I asked how many of your "hundreds" of transactions were from China in the past few years. You have only listed 6. Here are three China sellers who meet your 98% threshold. Which do you...

Only 6 of those are from China.

How many transactions from Chinese sellers in the past few years, and what were their positive feedback percentages?

No, you are falling into the same trap that many naive ebay buyers do, and it is exactly what these unscrupulous sellers are counting on to take advantage of. As I suggested, if you see a China seller wtih 99% positive feedback, it is NOT true that you have a 99% chance of having a positive...

Unfortunately, that is not true. 99.0% is not nearly good enough. I have seen and heard about quite a few sellers in China with 99.0 or 99.5% positive that are not trustworthy. They seem to be very good at gaming the system. Obviously, if it were really true that 99% of the customers had a...

One thing that I found with some of the ebay sellers in China is that they will specify the ePacket delivery, which has tracking available with the US postal service. However, the fraudulent sellers (which seems to be a lot of the ones in China) will ship you a "free gift" by ePacket and they...

No, I am not wrong. This is basic electronics. For a component to be able to change the current without changing the voltage, it would need to have an I-V curve with a completely vertical line. The only common passive components that approximate this are diodes (rectifiers), but fans (electric...

Again, this is nonsense. If you change the current sourced through a fan, the voltage across the fan also changes. As for motor efficiency, that is a red herring. As I already explained, the key point is that the fan wall needs some minimum air flow to keep the HDDs cool, and given that...

Hilarious! It is good that you admit that you do not understand basic electronics and will not waste your time posting more nonsense.

Nonsense. There is no such thing as "static pressure fans". Some fans are better at moving air when there is a pressure differential across the fan, but it is not a black/white distinction. For a given air-restriction, different fans will have different air throughputs. The actual graphs of...

Why not get a fan controller? Then you can adjust the voltage to multiple fans easily. And it should specify the currents that it can handle. Although I am not sure whether that will decrease the power consumption a lot, since there will be some current going through a resistor (it will reduce...

Actually, fans capable of high static pressure are an excellent choice for the fan wall of the Norco 4224, since the airflow through the HDDs sleds is restricted. In order to get significant airflow through the restricted space, it is necessary to create a low-pressure region between the fanwall...

That is nonsense. Static pressure refers to the pressure difference "across" a fan when there is no net air flow through the fan. For example, if you seal a fan to an opening in an otherwise airtight box, then run the fan at full voltage. The pressure difference between inside the box and...

I just thought 7W sounds like it is at the high end, like you say with high static pressure, and also full speed. I wonder if the power usage is 7W in your actual server. Also, I don't know if you have a supermicro motherboard, or some other motherboard that allows you to adjust the fan speed --...

Have you actually measured the power consumption of the fans with a meter?

2015Q3: informare 2016Q1: informare: Survival analysis of hard disk drive failure data: Update to Q1 2016 They take backblaze's raw data and create survival charts, which are graphs of the fraction of HDDs remaining alive as a function of days in operation. I think they are a good way of...

The little high-speed fans on those Supermicro PSUs sound like vacuum cleaners to me. If you don't mind the noise of a vacuum cleaner running constantly, then no problem. I have a Norco RPC-4224 that is about 2 years old now. The main reason I got it is because it holds a lot of HDDs and allows...

Yes, as I said, TRIMmed blocks are the same as overprovisioned blocks as far as the SSD is concerned. Your repeated statement about TRIM not happening in real time is a red herring. If you never fill your drive up past, say, 90%, then the only time it would matter how long TRIM takes would be if...

The SSD treats TRIMmed blocks the same as overprovisioned blocks. So evilsofa is correct, assuming the filesystem is passing TRIM commands along to the SSD. On the other hand, if you are running without TRIM, then overprovisioning could be helpful.

If you do not want your data loose, keep it locked up. How many times can someone write "loose" instead of "lose" in one post? I think that was a new record. Give that poster a medal and make sure he does not loose it.

That explanation does not make sense. I don't know whether you are right or wrong about them having an airtight seal when powered off which opens when powered on, but if you are right, then that does NOT explain anything about water vapor passing through the breather hole. This seems obvious...

Because ddrescue is more likely to recover more data than any filesystem-level copy. Even more so if the drive is not stable but is deteriorating with time and usage.

First of all, you should be careful when talking about ddrescue or dd_rescue. They are quite different. ddrescue usually refers to GNU ddrescue, which is a C++ program that is vastly superior to the dd_rescue shell script originally written by Kurt Garloff. There is little reason to use...

How exactly have your drives failed? What are the exact symptoms or indications you are using to determine that they have failed? Have you done any follow-up tests to determine failure modes? Have you examined the SMART attributes?

Note that a major assumption of the MTBF methodology is that the product has a CONSTANT failure rate. If you buy that the actual failure rates for hard drives are the same in the first year as in the fifth year, then I have a bridge in Brooklyn that you might also like to buy.

I quickly browsed through some of the information on Amazon Snowball, but I could not find any significant information on retrieving your data. Since they let you keep the Snowball for 10 days, the ideal situation would be that you simply transfer your data in, then transfer it back out onto...

Have you considered buying what you need, and then selling it on ebay afterwards? You could figure out how much of a hit you would take with the lower selling price, and compare it to the rental prices you are seeing.

This is a misleading statement, for several reasons. 1) The situation described is uncommon. A very small percentage of HDDs (or SSDs) are going to be powered off for years with the expectation that the data will later be able to be read. I'll venture to guess that the percentage is so small...

While I agree that HAMR seems like one of those technologies that is always a few years away, it is NOT true that there is "no way the write speed will be the same". The heat is provided by a very highly focused laser beam which creates a high intensity at the platter -- in other words, high...

I just use a damp cloth.

I think they are the same as the other 7200rpm 3.5" Toshiba drives (the PH3_00U models), except these have a 2-year warranty (instead of 3-year). I also think Toshiba is probably going to discontinue the others, and is moving to these X models. But that is all guesswork (except the warranty...

I already explained. Not all drives are the same. Not all attributes 198 are off-line testing only.

No, that is incorrect. As I already explained, when referencing an attribute, "offline" or "always" refers to whether the attribute is updated only during offline testing, or whether it is updated during normal operation of the device or during both normal operation and off-line testing. As...

No, not always. It depends on the drive. As I said, some drives will try writing to the same sector and if the write completes without error, then they will not reallocate it. Here is an excerpt from the wikipedia entry about SMART attribute 197: https://en.wikipedia.org/wiki/S.M.A.R.T...

Little of that is necessarily true. It may be true for some drives from some manufacturers, but it is not true for all drives from all manufacturers. Statements like "90% of pending sectors are without physical damage" are not useful, since if they are correct at all, they are only correct for...

You did not write anything that was incorrect. I don't know what Cipher was complaining about.

Okay, thanks for the reference link and clarification. I think the misunderstanding was a result of your statement that the "database applications will not be able to keep track of the large number of fragments". From my reading of the microsoft report on the issue, it is not really the...

Are you saying that those database applications bypass the Operating System file IO routines -- reading (and writing) the filesystem metadata themselves and doing their own sector-level IO? If that is true, it is rather scary if you have anything else besides database files on the filesystem...

Nope, that would not significantly cut costs. In fact, in some areas it would raise costs (larger PCBs, larger cases, more chip packages). Overall, the difference would be negligible. The $ / GB would be almost the same as a 2.5" SSD, since the cost of the flash dominates once you get over...