If you are planning to directly replace the SATA magnetic disks with SATA
SSD's then although you will reduce significantly the seek time but the
bandwidth of SATA is no where near the bandwidth of NVMe. SSD's are
intrinsically better than magnetic disks although magnetic disks are now
available up to 20TByte in capacity.
If I was you I would get a PCIe 3.0 or 4.0 2*NVMe Raid 0/1 carrier and
install two SSD's on to it and mirror them. Even though SSD's are very
reliable your data is more valuable.
Don't go for super cheap SSD's as the write threshold will be low. I would
look at Samsung for SSD's for performance or Kioxia (Toshiba) SSD's for
price. As regards the carrier I would look at Sonnet or Highpoint. Bear in
mind that the commercial sweet spot for SSD's is 1 or 2 TByte.
Mark Woolfson
-----Original Message-----
From: CentOS <centos-bounces@xxxxxxxxxx> On Behalf Of Walter H.
Sent: 26 December 2020 20:26
To: centos@xxxxxxxxxx
Subject: Re: Disk choice for workstation ?
If I were you,
I'd do the 2nd ... use a larger SSD (1 TB), and keep the mirror set (raid 1)
for /data Walter
On 26.12.2020 21:20, Nicolas Kovacs wrote:
> Hi,
>
> My workstation is currently equipped with a pair of Western Digital
> Red 1 TB SATA disks in a software RAID 1 setup.
>
> Some stuff like working with virtual machines is a bit slow, so I'm
> thinking about replacing the disks by SSD.
>
> I'm hesitating between three different setups:
>
> 1) Use a relatively small SSD (120 to 240 GB) to reinstall the system on
it.
> Keep the two SATA disks in a RAID 1 array and mount /home on it.
>
> 2) Use a larger SSD (500 GB to 1 TB), install everything (including
> /home) on it. Keep the two SATA disks in a RAID 1 array and mount them on
/data for storage.
>
> 3) Get rid of the disks and go full SSD, with a 1 TB disk.
>
> Any advice from the hardware gurus on this list?
>
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