MP 1,1-5,1 Slow boot and slow read/write SSD

[JMVB]

Brand new old stock cMP 5.1, X5670, 32gb RAM, RX580 8g.

Opencore, Mojave, APFS, Crucial M4 512gb (SATA)

The boot time increase a lot after trim enable..

And the read/write speed leaves much to be desired (250/250 M/Bs)

Anyone with the same issue?

 

[MarkC426]

That is normal read write for sata 2 ssd.
On a pcie card it's sata 3 at 500MB/s.

 

[Juicy Box]

Those speeds are good.

Anyone with the same issue?

I do, but it is not really an issue, but more like the consequence of the equipment.

With SATAII, it is a max of 3Gbps, or slightly below 300MBps max with overhead.

Here is a single SSD from my Mac Pro 1,1:


That is about halfway full, and around the speeds you are getting.

If you need something faster, there are some options for you.

Is there a particular speed you need?

 

[h9826790]

The boot time increase a lot after trim enable..

This is a bug of APFS.

If you don't need APFS, and don't care about security update. You can clone your existing Mojave to a HFS+ SSD, then you will have fast boot again (with TRIM still enabled).

 

[Juicy Box]

This is a bug of APFS.

If you don't need APFS, and don't care about security update. You can clone your existing Mojave to a HFS+ SSD, then you will have fast boot again (with TRIM still enabled).

Good idea.

And even if security updates are important, you can do the method above, and then reverse it when you need a security update, and repeat the process.

Example: clone APFS to HFS > use HFS until a security update > clone HFS to APFS > install security update on APFS > then repeat from the beginning.

Maybe not worth the effort to save a little time on booting, but I don't see why it wouldn't work.

I was thinking about doing this method for installing Mojave on a internal RAID0 for my Mid 2011 iMac.

 

[JMVB]

Updated opencore from 0.6.1 to 0.6.4, boot time even slow...

I have 3 disk

bay 1: SSD main OS + opencore
bay 2: backup HDD
bay 3: storage HDD

How should I do the backup, erase and clone back to SSD, without lost opencore and the ability to boot?
(I have PC RX580 gpu)

1.- Superduper from ssd to backup
2.- boot into back up
3.- format +HFS ssd
4.- superduper from backup to ssd
5.- install opencore back to ssd

How to bless the ssd EFI being into backup? just drop the script into ssd efi partition and run?

 

[h9826790]

Good idea.

And even if security updates are important, you can do the method above, and then reverse it when you need a security update, and repeat the process.

Example: clone APFS to HFS > use HFS until a security update > clone HFS to APFS > install security update on APFS > then repeat from the beginning.

Maybe not worth the effort to save a little time on booting, but I don't see why it wouldn't work.

I was thinking about doing this method for installing Mojave on a internal RAID0 for my Mid 2011 iMac.

If I were you, and I want to do this, I will...

1) have a APFS Mojave
2) Clone that to the HFS+ SSD for daily use.
3) Make a HFS+ to APFS clone daily as the bootable backup

When update avail, update the APFS Mojave, and clone that to the HFS+ Mojave.

 

[Juicy Box]

If I were you, and I want to do this, I will...

1) have a APFS Mojave
2) Clone that to the HFS+ SSD for daily use.
3) Make a HFS+ to APFS clone daily as the bootable backup

When update avail, update the APFS Mojave, and clone that to the HFS+ Mojave.

Yeah, that is exactly what I plan on doing, scheduling CCC to just make a daily back up.

Once there is a security update, then just boot into the APFS drive, do the update, then reverse the cloning, rinse and repeat.