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Nintendo Wii U
Fixing system memory error 160-0103 (failing eMMC) without soldering | using redNAND with ISFShax
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<blockquote data-quote="SDIO" data-source="post: 10282173" data-attributes="member: 636278"><p>The raw write performance should be faster than the normal mlc, since SCFM is disabled. But I could only measure a real difference during game install. And when installing from SD to the redNAND that halves the throughput again.</p><p>I only tested with MK8. Installing it from SD to the original eMMC took 13:54, installing the update (excluding the download) from eMMC to eMMC took 4:25. Starting MK8 took 23-24 seconds.</p><p>On the redNAND with SCFM disabled the install took 8:58, update 1:38 and start 21 seconds.</p><p>SCFM is just killing the performance for large writes as it seems every write goes through the tiny 128MiB scfm.img on the SLC before it gets to the MLC.</p><p></p><p>For the boot times, I expect them to be a few seconds longer, since it has to go through ISFShax and minute.</p><p></p><p>If you want, you can still use redNAND on a working Wii U. You don't even have to install ISFShax for that (but you can), but you can load minute every time from the fw_img_loader. So you can basically dual boot between your sys NAND and the redNAND. Please keep in mind that if you set it up like described here you still use the sys slc. So for playing around I would recommend using a complete redNAND with all partitions redirected. For that you would use the the Format redNAND option in minute, which clones your whole sys NAND with all three partitions to the SD. You can then use this rednand.ini</p><p>[CODE]</p><p>[partitions]</p><p>slccmpt=true</p><p>slc=true</p><p>mlc=true</p><p></p><p>[scfm]</p><p>disable=false</p><p>allow_sys=false[/CODE]</p><p>Notice that there are all 3 partitions enabled and the scfm stays enabled, because you cloned the sys MLC, which needs scfm. With that setup the performance will be even worse than the standard eMMC, since the cache for the MLC and the MLC is now on the same media. To get rid of SCFM, you can then format the mlc partition to NTFS on the PC, set disable=true and follow the instructions for the rebuild.of the MLC.</p><p></p><p>EDIT: you could also get the speed improvment on the sys NAND, but that would require that you alkways boot with ISFShax to use the unlimit plugin and reinstall the MLC there (or restore a MLC backup that was created using the recovery, because that removes also the SCFM dependency).</p><p></p><p>EDIT2: the speed of the SD shouldn't matter too much, as the Wii U is limited to 26MB/s anyway. Reliability / write endurance is for more important.</p></blockquote><p></p>
[QUOTE="SDIO, post: 10282173, member: 636278"] The raw write performance should be faster than the normal mlc, since SCFM is disabled. But I could only measure a real difference during game install. And when installing from SD to the redNAND that halves the throughput again. I only tested with MK8. Installing it from SD to the original eMMC took 13:54, installing the update (excluding the download) from eMMC to eMMC took 4:25. Starting MK8 took 23-24 seconds. On the redNAND with SCFM disabled the install took 8:58, update 1:38 and start 21 seconds. SCFM is just killing the performance for large writes as it seems every write goes through the tiny 128MiB scfm.img on the SLC before it gets to the MLC. For the boot times, I expect them to be a few seconds longer, since it has to go through ISFShax and minute. If you want, you can still use redNAND on a working Wii U. You don't even have to install ISFShax for that (but you can), but you can load minute every time from the fw_img_loader. So you can basically dual boot between your sys NAND and the redNAND. Please keep in mind that if you set it up like described here you still use the sys slc. So for playing around I would recommend using a complete redNAND with all partitions redirected. For that you would use the the Format redNAND option in minute, which clones your whole sys NAND with all three partitions to the SD. You can then use this rednand.ini [CODE] [partitions] slccmpt=true slc=true mlc=true [scfm] disable=false allow_sys=false[/CODE] Notice that there are all 3 partitions enabled and the scfm stays enabled, because you cloned the sys MLC, which needs scfm. With that setup the performance will be even worse than the standard eMMC, since the cache for the MLC and the MLC is now on the same media. To get rid of SCFM, you can then format the mlc partition to NTFS on the PC, set disable=true and follow the instructions for the rebuild.of the MLC. EDIT: you could also get the speed improvment on the sys NAND, but that would require that you alkways boot with ISFShax to use the unlimit plugin and reinstall the MLC there (or restore a MLC backup that was created using the recovery, because that removes also the SCFM dependency). EDIT2: the speed of the SD shouldn't matter too much, as the Wii U is limited to 26MB/s anyway. Reliability / write endurance is for more important. [/QUOTE]
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Fixing system memory error 160-0103 (failing eMMC) without soldering | using redNAND with ISFShax
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