πŸ’° PCI I-RAM Working Without A PCI Slot | Hackaday

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Yeah, I never heard of PCIe ram that was actually not a ramDISK. Why do you need #9. Or a M.2 drive, or M.2 Drive and a PCI-E adapter.


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All of the wires from his adapter were run to Molex connectors. This allows [Gnif] to power the device from a computer power supply. All of the.


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If you want to buy cheap pci express ram adapter, choose pci express ram adapter from ngiklangratis.pro It endeavors to provide the products.


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Install M2 SSD in your empty DDR memory slot without occupying PCIe / PCI slot; Compatible with M.2 SSD B-Key (SATA version); Can install M.2 ,


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All of the wires from his adapter were run to Molex connectors. This allows [Gnif] to power the device from a computer power supply. All of the.


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One 'adapter' PCIe RAM Expansion Board would be (supposedly) compatible most PCs. What am I missing since this hasn't been done yet?


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Yeah, I never heard of PCIe ram that was actually not a ramDISK. Why do you need #9. Or a M.2 drive, or M.2 Drive and a PCI-E adapter.


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Supermicro has motherboards that support this, Intel supports it in their Haswell-E Xeons. Yeah, I was looking for this. Lighten up guys. He had to connect all of them in order to share the current load. Report comment. Even extremely low probabilities of error per bit per hour, a steadily-running storage of several Gigabytes will, at some point, show bit errors.

All of the data transfer is actually done via a SATA cable. He later tested the current draw and found it reached as high as 1. There is a reason hardware raid cards use a piece of battery backed ram directly on the raid card for the cache.

For pci to ram adapter temporary files when compiling, database query logs, … The amount of IOops a ramdisk can do is enormous, but when using the OS cache it will typically write them to disk every so oftwen, reducing IOops and wearing SSDs. Sure ram is fast, but you need a fast connection to your processor to pci to ram adapter advantage of it.

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ZFS will return near instantly due to the ability to write the data to the ZIL, and asynchronously write the data to disk, allowing high performance with synchronous file operations enforced. This gives me a device with a near infinite life expectancy that can perform in excess of 20, IOPS. The insane IOPS this device can handle makes it more then enough for the general small office server, and the ZIL drive barely needs more then a few hundred MB of space. For zil IOPS is way more important than total transfer rate, Ind if fast enough you can set the zfs pool to use sync writes always, gaunteeing never loosing much data in case of power failire, the fast ZIL storage prevents performance loss by forcing sync writes. BTW: the tmpfs on linux is implemented by using this caching facility, but without a backing store, so the cache can never be flushed to disk. All of the connections were covered in hot glue to prevent them from wriggling lose. Just set up a RAMDisk in software, bingo bango, done. But it was useful and made sense to the initial poster. Learn more. Correction, Leave a Reply Cancel reply. It is backed up by supercapacitors. If you have the RAM, the OS will automatically cache your disk accesses, with similar performance as a RAM disk, but with automatic backup to a real disk. But for someone looking to replicate this build, it should be possible to make it work with only 6. Finally, the reset pin needed to be pulled to 3. Not stated is which supply rail that 1. Read up on it before you throw this idea out. Read up on ZFS, you clearly do not understand the reason why you would want a cache like this. The disk cache is free to use all or as little as necessary. All in all, this ended up being about 20 pins… He later tested the current draw and found it reached as high as 1. All of the wires from his adapter were run to Molex connectors. All in all, this ended up being about 20 pins. If so sign me up for a TB. This can be done because we can tell ZFS to enforce synchronous file operations, which normally would cause a major slowdown, but if ZFS has a reliable place to write the data that is very fast ZIL , it will perform like an asynchronous file system. Slower bulk throughput, but if the drive is used as a ZIL drive, it is more than fast enough as IOPS matters here, not bulk throughput. Creating a ramdisk can be useful to store files you will never want to put on actual disks. I think you need to learn how fast system ram is before you jump to conclusions like this. If you look in the bottom left of the picture you can see the battery backup for the DRAM. Does it have supercapacitor backup with optional solar recharge? This depends on your system board. The limiter is how much any single process can allocate. All of it is accessible via PAE and is usable by Linux. By the time you go putting a 10 year old asic between the ram and your processor you may as well be communicating with smoke signals. Learn how your comment data is processed. This allows [Gnif] to power the device from a computer power supply. Yes, but in a case of power failure, your DDR-based buffer will still be wiped, so this has no advantages in practical application. Problem has been identified and a solution has been standardized. If you wanted to keep more in fast ram often a SSD array is used as a L2ARC cache to allow hundreds of GB of data to be in fast cache, backed by a slower multi TB array, providing extreme performance at a reduced price. If used as a ZIL drive for the array it will prevent data loss if there is a power outage when data is cached in RAM but has not yet been written to disk. Who on earth would cache a ZFS array on a usb drive?? This site uses Akismet to reduce spam. DDR is capable of The card used in this build gigabyte i-ram benchmarks at about 25, IOPS 4k , and its sequential writes speed is limited by the legacy sata connection to about 1. The things are cheap as hell right now, and everyone has some laying around.