Disk Read/Write never gets above 20MB/s until I Run BlackMagic.

Question

iMac Intel 27" EMC 2546 修理指南

型号：A1419／ 2012／2.9 & 3.2 GHz Core i5 or 3.4 GHz Core i7 专业版

20 个问题查看全部

Piotr Kocybik @piotrkocybik

声誉积分: 1

1

发帖于: 2021年12月26日

更多选项

Disk Read/Write never gets above 20MB/s until I Run BlackMagic.

My late 2012 27” i5, without an SSD got very very slow. Disk Read/Write never gets above 20MB/s with normal computer usage until I Run BlackMagic, when disk is capable of hitting over 80MB/s . CPU use is minimal, ram is free and so is disk space.

Looks like something is throttling the system disk access, so anything i do is painfully slow. Apple System Diagnostics shows no errors with even the most thoroug scan, surface scan prooved no errors and so did fdisk -fy from single user mode. Heck, what else could I do except trying to run it from an external ssd installed system?

回答此问题我也有这个问题

这是一个好问题吗？

是否

得分 0

2条评论:

What is the version of OS you have on your system?

由 Dan 完成的 2021年12月26日

I'm on Mojeve now, but things heve been going downhill since previous versions. I did not pay too much attention to it as I've been mostly using it for leisure and my MBP for work for a couple of years, but I could use the bigger screem now but it appears unusable for any serious task.

由 Piotr Kocybik 完成的 2021年12月29日

添加一条评论

1个答案

I'm on Mojeve now, but things heve been going downhill since previous versions. I did not pay too much attention to it as I've been mostly using it for leisure and my MBP for work for a couple of years, but I could use the bigger screem now but it appears unusable for any serious task. — Piotr Kocybik

Dan @danj 声誉积分: 489.3千 Self employed contract worker 35 338 973 · Answer 1 · 2021-12-29T14:54:14-07:00

Dan @danj

声誉积分: 489.3千

Self employed contract worker

35

338

973

发帖于: 2021年12月29日

更多选项

Well I’ve got some bad news ;-{

This macOS version don’t work well on HDD’s as it runs the newer APFS file system and currently there is no means to defragment the HDD like we could with HFS+. It was designed to run on SSD’s which work on a block basis not cylinder/sector a HDD works off of.

So to fix this you will need to backup your drive (TimeMachine), then reformat it and install a fresh OS onto it and then restore your user accounts, apps & data (Migration Assistant).

The other approach is just bite the bullet and get a SSD swapping out your old spinning rust drive.

这个答案有帮助吗？

是否

得分 0

2条评论:

That's not such a bad news, after all, it's the first in some time that's worth diggin into. I'm only wondering, why would black magic succeed in reaching higher speeds, whilst everything else would be in slo-mo?

由 Piotr Kocybik 完成的 2021年12月29日

@Piotr Kocybik - The drive is used for caching and virtual RAM. How the application runs between the two drives is what you are seeing. The difference between of how your HDD SATA III (6.0 Gb/s) drive and the mSATA blade drive which is also running at SATA III (6.0 Gb/s).

由 Dan 完成的 2021年12月29日

添加一条评论

iMac Intel 27" EMC 2546 修理指南

Disk Read/Write never gets above 20MB/s until I Run BlackMagic.

1个答案

添加你的答案