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marcojr

macrumors newbie
Original poster
Sep 29, 2017
2
0
Hi ! I've a MBP Pro 13" Retina where the SSD delivers 1.4gb/s with is very good !

I've a need to use a VM with mac os as well. I placed the VM in an external mechanic hard drive, but the performance is very disappointing. Mac OS hosting other MAC OS usually is a bad experience even if the VM are hosted in your own mac internal SSD.

So, I need to reach the most possible speed for an external SSD. So, can someone suggest me a good combo of SSD enclosure + ssd drive to archive the most similar performance of my internal SSD ?

ty !
 
Welcome to the Forums!

I only use Samsung SSDs, buying when they're on a promotion. Pros in my Macs/PCs and EVOs in storage usage (enclosures/ingest stations). I use my EVOs for both VMs and for scratch disks (CAD/video/PS).

My two portables are an 500GB 850 EVO in either a Sabrent or NexStar USB 3.1 Gen 2 enclosure. $140 for the disk, $15 for the enclosure. At $155-$160 for the combo, the introduction of the Samsung T5 has pushed the T3 on sale for $160-170, the T3 is just as zippy as the combo I'm using in a far more compact form factor. The speed limitations of the SATA III controller/interface and USB 3/3.1 keeps units like these at a ceiling, even the new T5 is about the same throughput. My 2¢.
 
USB-C, even 3.1 gen 2, when fully saturated, cannot come even close to your internal SSD - you would need to leverage Thunderbolt 3 and the power of m.2 NVM express SSDs, which are limited in selection and heavy on the wallet. That said, I run VMs off of SATA 6.0 SSDs (getting about 525 MB/s read, and 500 MB/s write), and the performance is outstanding.

I currently use SanDisk Extreme PRO and Samsung 850 PRO SSDs in Oyen Digital eSATA enclosures for my VMs. The less-expensive Samsung 850 EVO gives near identical performance and it is an outstanding drive. I use the Oyen USB-C 3.1 gen 2 enclosure as well, and am extremely satisfied with the quality of their products and the chipsets they use in them.
 
Good luck with an Oyen Digital Minipro and standard Samsung 850 series. A Samsung T5 gets a little better, but nothing with get you internal speed until there's a reasonable way to plug in 950 type Express cards with or without raid. Good luck
 
Like everyone said, if you need faster than ~500MB/s, you need to go either NVME M.2 and some sort of Thunderbolt enclosure or do a RAID0 of a couple of SATA SSDs. However, a Samsung T3, a T5 or a WD My Passport SSD should work perfectly for your kind of needs.
 
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