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Thread ID: 143699	2017-03-21 02:31:00	Cloning Server RAID1 SATA drive to SATA SSD	Geek4414 (12000)	Press F1

Post ID	Timestamp	Content	User
1433119	2017-03-22 20:16:00	Conclusion is that not all cloning software are created the same. The Active Boot Disk Demo ISO ...... Absolutely I usually use Active@ Live CD, or WD/Acronus I get the occasional laptop that I need to try 4,5 different cloning programs to find one that worked The RAID controller could be(will be?) writing the RAID info onto the actual drives, that could be screwing things up after cloning ?	1101 (13337)
1433120	2017-03-23 22:28:00	Also check the partition alignment of the SSD, sometimes cloning mucks it up and it hurts performance quite a bit. Happened to me when I cloned windows, managed to fix it but that was ages ago and I forget what tools worked in the end. See if this is helpful lifehacker.com Thanks dugimodo, will have a look into that. I will image the current cloned drive to an image file first before mucking around with the drive alignment. Have ordered couple of Samsung 850 Pro but they have not arrived yet, hope they will turn up later today, so I can get on with it this weekend. By the way, the forum thread below is very informative! Consumer (or prosumer) SSD's vs. fast HDD in a server environment ... serverfault.com Some useful bits ... Keep your disk's private cache enabled. Some RAID card will forcibidy disable the disk's private cache. This kill performance for consumer-level SSD, as they make heavy use of private DRAM cache both to cache their indirection table and to mask the heavy latency involved into erasing/programming MLC NAND. For example, an otherwise very fast Crucial M550 240GB drive write at incredibly slow rate of 5 MB/S when its internal cache is disabled. --- The performance inconsistency of consumer SSDs can cause problems with some raid controllers, the spikes in I/O latency are exacerbated when using a raid controller as it often will not be using TRIM (I don't know of any controller that does). Enterprise drives are designed around consistent performance even without TRIM so they typically play well with RAID controllers. --- If you're looking at endurance, a modern, high end, consumer SSD (like the samsung 850 pro) have pretty decent endurance. The 850 pro's rated for 150-300 tb of writes (compared to 73 tb for the older model, and 7300 to 14600 tb for the newer models). --- Also kind of confirmed that the 850Pro is probably a good enough choice in absence of server graded SSDs The 850Pro looks good in this benchmark too and it comes with 10 years warranty ... ssd.userbenchmark.com	Geek4414 (12000)
1433121	2017-03-23 22:33:00	Absolutely I usually use Active@ Live CD, or WD/Acronus I get the occasional laptop that I need to try 4,5 different cloning programs to find one that worked The RAID controller could be(will be?) writing the RAID info onto the actual drives, that could be screwing things up after cloning ? Yes, I have used many different disk imaging programs in the past, starting with Ghost in the DOS days. One of the forum post I read recommended CloneZilla for this type of scenario, that's why I went with that to start with, unfortunately that turn out to waste couple of days of my time. Never mind, chalk it up to learning, in the process of doing this, I have learnt a ton of new info! And also discovered the very useful Active Boot Disk, save mucking around creating WinPE boot images which seems to have compatibility issues with certain commands depending on which version of WinPE was used.	Geek4414 (12000)
1433122	2017-04-02 11:42:00	Update ... Cloning to the Samsung 850Pro went all smoothly. First cloned the RAID1 array to my spare SSD, disconnected both HDD, created new RAID0+1 array and cloned from the spare SSD back onto the array. All went smoothly and it did a scandisk upon rebooting and after another reboot it booted back into Windows Server 2008R2 successfully. The pair of 850Pro is way faster than the HDDs, and even much faster than the 830PM SSD I used for testing. Speed test results ... 7987 The read speed is 531% higher than the HDD and 165% faster than the 830PM. In the process of researching this, I've also found that Samsung SSD has a Rapid Mode which increase the speed even further but unfortunately does not work on the RAID array in this case. I applied Rapid mode to my own 850Pro on my Desktop PC and the speed increase is huge 7988 7989 Samsung Magician is only available for NTFS system, and read the limitation before installing it. Download it here ... www.samsung.com	Geek4414 (12000)
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