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Questions tagged [sas]

Serial Attached SCSI (SAS) is a computer bus used to move data to and from computer storage devices such as hard drives and tape drives. SAS depends on a point-to-point serial protocol that replaces the parallel SCSI bus technology that first appeared in the mid 1980s in data centers and workstations, and it uses the standard SCSI command set.

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Recovering data from a failed SAS drive? (RAID0...yes, I know)

We have a HP DL360 server with a P400 controller, which has two 72GB 10K SAS drives in a RAID 0 configuration (yes, I know...RAID 0). The HP Model number for the drives is DG072A8B54 Recently, one of the two drives appear to have failed, and is no…
victorhooi
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Difference between SAS multilane, direct-attached HDD and expander backplane?

What's the difference between multilane, direct-attached HDD and expander for SAS backplanes? Supermicro chassis description page Direct attached HDD backplane (TQ version), multilane backplane (A version) and expanders' backplane (E1, E2 versions)…
elleciel
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ZFS: SAS v SATA - does it matter?

I understand from NEC's white paper, Silent data corruption in disk arrays, that: some SAS drives should have a "T10-DIF" feature to detect silent data corruption; whereas "There is no standard for ATA-based drives (including SATA) that protects…
user61015
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SAS internal cable compatability

In the office, we've elected to whitebox go with a commodity approach to a certain class of server we'll eventually need a lot of. It's time to consider picking up a few more. It has been a year since the last time we did this, so I'm looking to…
Blue Warrior NFB
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How to use SAS Expander with RAID card?

I've doing some researches since few days and I haven't really got an answer to my question. I am in the process of building a huge file server for the company I work for. We bought a server case NORCO RPC-4224 4U rackmount server case with 24 bays…
David Bélanger
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26 hard drive limit on x86 servers, IBM x3650, Dell PE 2950, Dell PE 2850, where is my limitation?

This is in regard to mass HDD wiping/testing. The software I use, WipeDrive Pro 5 and 7, both fall victim. I originally thought it was a limitation of the software, but after speaking with the software company, I was told there is no limit but what…
BryanVoy
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Are all SAS drives hot-swappable?

Can get a 300GB Cheetah 15K SAS 3.5 disk for quite a bit cheaper through another supplier vs. Dell's out-of-warranty depot (for an aging PowerEdge server). Specs are identical, wondering if there's any difference that I'm not seeing as far as…
gravyface
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Would using SAS disks instead of SATA disks make sense over NFS for a VMWare datastore?

We are deciding whether to use SATA or SAS aggregates on our Filer for our VMWare datastore. We will be using NFS to connect the VMWare hosts to storage. Doesn't seem to make sense to use SAS disks that have 6GB/s pipeline (15000 RPM) if it's going…
Belmin Fernandez
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SAS enclosure doesn't restart - MSA60

I just inherited a HP StorageWorks MSA60 (this is a direct-attach SAS enclosure). I had to move it to another shelf so I turned off the computer which was using it. I also pulled the 2 power cords off the MSA60 (no power button, so the only option…
Bertrand SCHITS
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Is it normal for a SAS drive to have a few bad blocks, or should I replace my drive ASAP?

I have a drive—part of a RAID 1 mirror—that has two bad blocks. Adaptec Storage Manger e-mailed me when it detected the blocks. It shows 4 medium errors for that drive, but state is still “optimal”. This is my first time using Adaptec RAID…
Nate
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Nearline SAS on SATA controllers

I know that SAS drives cannot operate on a SATA controller. I know that SATA drives can operate on a SAS controller. But can Near-Line SAS drives, being SATA drives with a SAS controller, be used on A) only SAS controllers B) both SATA and SAS…
Vincent Vancalbergh
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Can SAS Tape Drive (HP StoreEver 6250) used with LSI SAS 9200-8e-HP?

I plan to buy secondhand HP StoreEver 6250 tape drive for backup purpose, but not sure what SAS Card that are compatible with that device and works on ubuntu seamlessly. One of the SAS card that I saw from the same seller is LSI SAS 9200-8e-HP,…
Kokizzu
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Issue with LSI SAS2116 - no drives being detected on Fedora 32 kernel 5.8.*

Last week I updated my kernel using the regular DNF update process. On reboot, none of the drives in my mdadm arrays were detected. I narrowed down the issue to a problem with the kernel and used an older kernel to boot. I waited a week for the next…
RedTedRedemption
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If I connect a SATA3 6Gbps SSD to a SAS2 6Gbps port using a breakout cable, will I get SATA3 speeds?

I have 2 SATA3 SSDs in my server, which are currently connected to SATA2 ports. If I wanted to get SATA3 speeds out of them instead, could I buy a SAS2 HBA and use an SFF-8087 to SATA breakout cable to get 6Gbps speeds out of it (since SAS2 is Gbps)…
D3matt
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How does HP DL380e G8 support 12 sas disks

I have an HP DL380e Gen 8. it has 12 3.5/LFF slots on the front. The backplane has two SFF8087 cables to the HBA. I thought that SFF8087 could only carry 4 SAS channels, so how do 12 disks work over 2 SFF8087s? Does it only support 8 at a time?
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