I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is obviously ancient, and the 2nd disk was installed using an ebay non-branded kit.
Even so, 1GB/min seems slow - might something be up?
On 15/01/2025 11:50, RJH wrote:
I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is
obviously ancient, and the 2nd disk was installed using an ebay non-branded >> kit.
Even so, 1GB/min seems slow - might something be up?
Bet they're shingled drives. Sustained writes are hideously slow once
the internal RAM buffer is filled.
There's no fix other than to replace them or avoid sustained writes.
I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is obviously ancient, and the 2nd disk was installed using an ebay non-branded kit.
Even so, 1GB/min seems slow - might something be up?
RJH <patchmoney@gmx.com> wrote:
I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is
obviously ancient, and the 2nd disk was installed using an ebay non-branded >> kit.
Even so, 1GB/min seems slow - might something be up?
Are these big files like videos, or a ton of tiny files? Tiny files can
have slow copying times, because there's very little data involved with each one and yet you pay a latency cost each time.
NVMe/Apple SSDs are better in
this respect than SATA SSDs, since they have lower latency.
On 15 Jan 2025 at 22:09:48 GMT, "Bruce" <07.013@scorecrow.com> wrote:
On 15/01/2025 11:50, RJH wrote:
I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is
obviously ancient, and the 2nd disk was installed using an ebay non-branded >>> kit.
Even so, 1GB/min seems slow - might something be up?
Bet they're shingled drives. Sustained writes are hideously slow once
the internal RAM buffer is filled.
There's no fix other than to replace them or avoid sustained writes.
That's a hard drive thing, won't be on SSDs.
Open up System Information and take a look under SATA, see if there's anything odd showing there. SATA 300 is normal speed, but I'm not on a
Mac that has any SATA at the moment so can't see if it shows that...
On 16 Jan 2025 at 15:32:02 GMT, Theo wrote:
RJH <patchmoney@gmx.com> wrote:
I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is
obviously ancient, and the 2nd disk was installed using an ebay non-branded
kit.
Even so, 1GB/min seems slow - might something be up?
Are these big files like videos, or a ton of tiny files? Tiny files can have slow copying times, because there's very little data involved with each
one and yet you pay a latency cost each time.
Big video files - it's used as a Plex media server.
NVMe/Apple SSDs are better in
this respect than SATA SSDs, since they have lower latency.
These are basic SSDs - one's a fairly recent 4TB Crucial, the other a 500GB Kingston. The transfer was from the almost full 4TB data disk to the near empty 500GB system disk.
File transfer aside, it's all trouble free - plays anything I've thrown at it,
and has been pretty solid in the 5 years or so it's been used like this.
On 16 Jan 2025 at 10:51:15 GMT, Jaimie Vandenbergh wrote:
On 15 Jan 2025 at 22:09:48 GMT, "Bruce" <07.013@scorecrow.com> wrote:
On 15/01/2025 11:50, RJH wrote:
I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is >>>> obviously ancient, and the 2nd disk was installed using an ebay non-branded
kit.
Even so, 1GB/min seems slow - might something be up?
Bet they're shingled drives. Sustained writes are hideously slow once
the internal RAM buffer is filled.
There's no fix other than to replace them or avoid sustained writes.
That's a hard drive thing, won't be on SSDs.
Open up System Information and take a look under SATA, see if there's
anything odd showing there. SATA 300 is normal speed, but I'm not on a
Mac that has any SATA at the moment so can't see if it shows that...
Both drives appear under Intel 6 Series Chipset and are listed as 6 Gigabit Negotiated Link Speed. So I'd guess that's OK.
The only odd thing that I can see is that both drives have 200MB FAT32 EFI volumes. Possibly from when I'd used them on Windows machines - although I can't think why I'd have done that, wouldn't put it past me.
I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is obviously ancient, and the 2nd disk was installed using an ebay non-branded kit.
Even so, 1GB/min seems slow - might something be up?
RJH <patchmoney@gmx.com> wrote:
On 16 Jan 2025 at 15:32:02 GMT, Theo wrote:
RJH <patchmoney@gmx.com> wrote:
I have an old Mac Mini (Mid 2011) - file transfers between the 2 internal SSDs
are taking over 1 minute/GB. The disks are fairly recent but the Mac is >>>> obviously ancient, and the 2nd disk was installed using an ebay non-branded
kit.
Even so, 1GB/min seems slow - might something be up?
Are these big files like videos, or a ton of tiny files? Tiny files can >>> have slow copying times, because there's very little data involved with each
one and yet you pay a latency cost each time.
Big video files - it's used as a Plex media server.
NVMe/Apple SSDs are better in
this respect than SATA SSDs, since they have lower latency.
These are basic SSDs - one's a fairly recent 4TB Crucial, the other a 500GB >> Kingston. The transfer was from the almost full 4TB data disk to the near
empty 500GB system disk.
File transfer aside, it's all trouble free - plays anything I've thrown at it,
and has been pretty solid in the 5 years or so it's been used like this.
I wonder if one of the SSDs is poorly. Can you check their SMART?
Theo
That's a hard drive thing, won't be on SSDs.
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