New-to-me Pegasus R4, novice hardware questions.

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John Moss posted this 2 weeks ago

I recently purchased a used Pagasus R4. This company, product line and entire class of products are new to me. I have never owned or used any drives in a RAID configuration. This is a learning project, so pardon the novice questions. 

I assume it's a first generation unit, but I don't know. The unit came with four 3.5" 7600 RPM 1 Tb Toshiba HDD. Prior owner said it's currently configured as RAID 5. The Promise Utility says the firmware is up-to-date, and everything has a green check. 

I have several questions:

(1) How do I confirm this is a 1st Gen Pegasus unit, and find the date of manufacture? The markings on the front just say "Pegasus R4." On the bottom is a serial number. On the back it says model "Pegasus R4," there are two bar codes one with a TLA number, and the other with a string of numbers and letters. There are a variety of inspection/certification symbols, one with a circular icon that looks like a fan and the letters R0HS, and under it there appears to be a year "2002/95/EC"? 

(2) Is there a way to estimate the remaining life on the HDDs? Does the utility have a measure of the "milage" on each drive, which I could look up and compare to the average lifespan of the drive by brand and kind?

(3) Can this unit be upgraded with SDD drives? If so, can the SDD drives be switched out one-by-one, or do they need to be switched all at once? In other words, is it capable of running a combination of SSD and HDD drives at the same time?

(4) If possible, what hardware is needed to switch out the HDD with new SDD drives? Are there 3.5" SDD drives that will fit out of the box? If not, is there a chassis adaptor to install 2.5" SDD drives? Names of available products and/or links to U.S. retailers would be appreciated.

(5) Can the internal RAM be upgraded, and is there any reason to do so? Currently it says it has 512 MB of DDR2 SDRAM. If I wanted to upgrade the RAM, what product would I use? Any improved performance if I do?

I also have questions about the RAID configuration--such as why the Logical Drive has a 3Tb capacity if there are four 1Tb drives--but I'll save those for a different post. I don't even know what a "Logical Drive" is, so I should do some reading first.

Thanks in advance!

R P posted this 2 weeks ago

Hi John,

(1) How do I confirm this is a 1st Gen Pegasus unit, and find the date of manufacture?

The simplest thing to do is to use the CLI. To open the CLI open a terminal and type in promiseutil. Then enter subsys -v.

Promises-MacBook-Pro:~ promise$ promiseutil
-------------------------------------------------------------
Promise Utility
Version: 4.06.0000.01 Build Date: Aug 4, 2021
-------------------------------------------------------------

List available RAID HBAs and Subsystems
===============================================================================
Type  #    Model         Alias                         WWN                 Seq
===============================================================================
hba   1  * Pegasus R4                                  2000-0001-5530-6d27  1

Totally 1 HBA(s) and 0 Subsystem(s)
-------------------------------------------------------------
The row with '*' sign refers the current working HBA/Subsystem path
To change the current HBA/Subsystem path, you may use the following command:

  spath -a chgpath -t hba|subsys -p <path #>.

Type help or ? to display all the available commands
-------------------------------------------------------------

cliib> subsys -v

-------------------------------------------------------------------------------
Alias:
Vendor: Promise Technology,Inc.        Model: Pegasus R4
PartNo: F29DS4722000000                SerialNo: N/A
Rev: A2                                WWN: 2000-0001-5530-6d27
CBSN: M74H11405200130                  Interface: Thunderbolt

cliib>

As you can see the Model is Pegasus R4. This is the original Pegasus. Since the Pegasus was released around 2011, that 2002 date is for something else.

(2) Is there a way to estimate the remaining life on the HDDs?

Not really. It depends on a lot of things. The lab's Pegasus R4 still has the original 1TB Toshiba drives it shipped with.

(3) Can this unit be upgraded with SDD drives?

The Pegasus R4 does recognize SSD drives and they can be used. Here are 2 SSDs in the lab system.

cliib> phydrv
===============================================================================
PdId Model        Type      Capacity  Location      OpStatus  ConfigStatus
===============================================================================
1    Micron_M550_ SATA SSD  255GB     Encl1 Slot1   OK        Array0 No.0
2    TOSHIBA THNS SATA SSD  199GB     Encl1 Slot2   OK        Array0 No.1

cliib>

(4) If possible, what hardware is needed to switch out the HDD with new SDD drives?

I'm not sure what you mean. The drive sleds have SSD mounting holes on the bottom, so you will need SSDs and SSD mounting screws, they are smaller than HDD mounting screws.

(5) Can the internal RAM be upgraded, and is there any reason to do so?

Sorry no, it's soldered in.

I also have questions about the RAID configuration--such as why the Logical Drive has a 3Tb capacity if there are four 1Tb drives

Most likely you have a RAID 5 logical drive. That means that if one disk fails, you will still have access to your data because one disk's worth of parity data is distributed across all the disks. So your 4TB (total) disk space becomes 3TB usable + 1TB parity.

 

 

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