![]() The NVMe standard has continued to evolve to the present version 1.31, with the addition of such features as the ability to use part of your computer’s system memory as a cache. Knowing well the ultimate performance potential of NAND-based SSDs even when they first showed up, it was clear to the industry that a new bus and protocol would eventually be needed. But, as the first SSDs were relatively slow (and bulky), it proved far more convenient to use the existing SATA storage infrastructure. But for your operating system, programs, and oft-used data, you want an NVMe SSD if your system supports it, or a SATA SSD if it can’t. Hard drives still offer tremendous bang for the buck in terms of capacity and are wonderful for less-used data. Some drives in each category might do better, some will do worse. Shorter bars are better, but this is an overall average. HD = 2-5 millisecond seek, SATA SSD = 0.2 millisecond seek, NVMe SSD = 0.02 millisecond seek. The CPU and GPU development curve pales in comparison to that of storage over the last 10 years. HDD = 200MBps, SATA SSD = 550MBps, NVMe SSD = 3GBps. Not that you need sustained throughput like this very often, but NVMe makes short work of transferring files of any size. The approximate performance ceilings for the three mainstream storage technologies as things now stand are: IDG That’s on top of the four- to five-fold improvement in throughput and ten-fold improvement in seek times that was already provided by SATA SSDs when compared to hard drives. Not only that, but it locates them 10 times as fast (seek). I will try that one next when my son brings it home from college.That’s because the NVMe SSD inside the latest MacBook Pro reads and writes data literally four times faster than the SATA SSDs found in previous generations. I have another laptop experiencing the same backup problems running Avira. So the culprit was the anti-virus program, in this case AVAST free-personal. I then disabled AVAST on both the laptop running Windows 7 and my directly connected desktop running XP, where I store my backups, music & photo libraries, etc., and the backups were then also successful. I disabled AVAST on my laptop and voila, the file transfer was successful. Then I noticed a posting that mentioned AVAST (or other anti-virus programs). ![]() Since I recently switched to WPA2-Personal from WEP, I tried it with WEP and then with no security. I thought it might be the router, so I tried a different one to no avail. I tried every kind of setting on my laptop (wireless) as per some of the posting on this issue. With so many changes, i.e., upgrade to Windows 7, software updates, new wireless router, etc., it was difficult to narrow down source of the problem. But recently large file transfers (a folder with several mp3 files) would fail and Windows and Retrospect backups to the network share would not complete (network drive no longer accessible). It used to work OK, i.e., transfering large files and backing up to a network share. This has been driving me crazy for quite a while. The second point, is when the connection drops, not only can I no longer connect to the router, I can no longer see any of the other networks present. The router is using the stand it came with and is mounted vertically, also, I looked for the short preamble setting under advanced wireless, but couldn't find it. It occurs with the router operating in any mode, a, g, n, and in 2.4 or 5ghz modes.Īny ideas on how to fix it? I checked D-Link's site, and it said to enable short preamble, but the advice was not product specific, and I can't find said setting on either m router or NIC. I've since tried connecting my laptop with an ethernet cable, and I don't experience the problem, my friend has also used his laptop and experienced the same problem. When transferring a large file however, (100MB+), in between 5 and 10 seconds the wifi connection on my laptop dies completely, requiring a reboot to fix, disabling and renabling the card doesn't work at all, it fails to recognize, ANY networks, not just my own. Most usage, I don't have any problems, but when playing movies the connection on my laptop drops out every five minutes or so, and then reconnects. I'm using it to host all my media on my desktop, and play it on my desktop over my network. Set up in my room, I have the D-Link DGL-4500 router.
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