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 ...

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478 views

SAN connected through SAS with SATA disk

let's have P2000 G3 with SAS Dual Controller and DL120 G6 with HP SCO3e SAS HBA cards. 1) I know it's bit dumb question, but just to be sure. The array will be filled by SATA disks. Will be the SAS ...
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3answers
2k views

Disk names in Solaris 10 for ZFS: SAS WWN instead of c0t0d0

I currently have a server running Solaris 10u9 with a SAS enclosure (Dell PowerVault MD1000) filled with SATA disks attached to an SAS card (LSI 3801E). It happily recognizes the 15 disks in the ...
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1answer
1k views

IBM System x3500 M3 refuses to boot from LSI SAS card if blank SATA drive is connected on mainboard

Have an IBM System x3500 M3 that refuses to boot from the IBM branded LSI SAS card if any SATA drive is also connected to the mainboard. The system restarts itself over and over. No error messages. ...
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4answers
2k views

Will any SAS drive work in a Dell PowerEdge server?

If I bought a Dell 2950 or 2650, for example, and it has no drives in it (from say an auction). Will any SAS drive I get work in it? I ask because they vary so much in price. Some drives are $150 ...
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2answers
1k views

Need help finding a SAS HBA controller for an IBM LTO 4 Tape Drive

I've got an older IBM x3200 M2 Server (MT: 4368) and I recently acquired a used internal IBM LTO 4 tape drive (FRU: 45E1125). The back of the tape drive requires an Internal SAS 29 pin connector ...
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1answer
2k views

Recovering data from SAS drives after failed SAS Controller Card?

The SAS Controller Card in a production server of ours went bad. This was an older server, and Dell does not have the card in stock and not ETA for one. So, I ordered one from NewEgg. I installed the ...
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4answers
380 views

Do I have to buy a SAS hd from Dell to work with a PERC 5 in PE1950

Is it true that for SAS hd to work with a PERC 5 controller it must have a special firmware on it put in by Dell which forces you to buy a hd only from them. The hd that came with the server is a ...
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1answer
82 views

Are zero channel SAS RAID controllers using proprietary protocols?

I have SuperMicro server with a dead zero channel SAS raid card, that is the motherboard has two 36 pin multilane SAS connectors. What I can't figure out is: Can I just buy say an IBM ServeRAID 8X ...
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2answers
995 views

Can I get redundancy with a JBOD storage subsystem

I have a Promise Technology J610S. This is a JBOD subsystem. Is it possible for me to buy a SAS hardware RAID controller and provide some type of redundancy for these drives? I am unsure whether I ...
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2answers
614 views

is it possible to direct connect a client and server with 10GBASE CX4 copper cables?

Server has two 10GBASE-CX4 ports. client has 10GBASE CX4 HBA. can theybe directly connected with a CX4 cable without the need for a switch? like SAS Infiband connectors?
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2answers
945 views

3 Gbps or 6 Gbps SAS harddrives? Does it make a difference?

Is there a real-world difference between 3 Gbps and 6 Gbps SAS drives in a server? I keep reading that harddrives don't even fully saturate 3 Gbps yet, so 6 Gbps is nothing gained. I'm using multiple ...
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5answers
326 views

HA Cluster having tower 4U server with SAS

I'm a little bit confused in here.. I want to have 2 node cluster with shared storage. I read all wiki page about HA cluster. Now in my head there's a scheme like: So we have two 4U tower servers ...
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1answer
451 views

PCI-E HBA on only PCI-E x16 slot on motherboard?

I read a post maybe last week that said you can't put a HBA card on the only x16 slot on motherboard that doesn't have onboard video. Is there any truth to this? I have a Gigabyte GA-965P-DS3/e6400 ...
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2answers
107 views

SAS, RPM, & Bus Speeds

I am working on spec'ing out a new Hyper-V server, and I am running into something that I find confusing--I have the following choices: 146GB 15k RPM, SAS, 3Gbps, 3.5" 146GB 10k RPM, SAS, 6Gbps, 2.5" ...
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4answers
3k views

HP smart array P812i and storage works enclosure D2700 BAD PERFORMANCE!

I have HP DL360 G6 with Smart Array P812i and Storage Works D2700 enclosure. Enclosure has 25x148GB 15K SAS 6G drives in RAID10 mode. P812i has 512mb cache (50% read/50% write) Crystal Disk mark ...
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1answer
2k views

What is the difference between NHS, HS and Slim-HS SAS Drives?

I am curious to what is the practical difference, if any to the following: IBM 300 GB 10K 6 Gbps SAS 2.5" SFF Slim-HS HDD 42D0637 IBM 300 GB 10K 6 Gbps SAS 2.5" SFF HS HDD 42D0612 ...
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3answers
298 views

Type of Storage for VMware View Implementation

We're doing a virtual desktop pilot and I was wondering what kind of SAN storage is commonly used. I've heard conflicting reports of SAS/SATA disks or even SSD or large read/write cache settings. ...
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8answers
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What are SAS external storage options (Promise, Infortrend, SuperMircro, …)?

We are looking for a ~32T external storage solution for two 48-core AMD servers. These will be used for a small Linux OpenVZ cloud for CPU intensive web-servers and data warehousing. Dual path with ...
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1answer
647 views

How many servers can connect to a SAS RAID without a SAS switch?

If we buy a Promise VTrak E610sD SAS Raid shelf and daisy-chain Promise VTrak J610sD SAS JBOD shelves to the Raid shelf How many Linux servers with SAS HBA cards can get access to this setup ...
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3answers
505 views

SAS Drives on VMWare ESXi Installable 4.0 u2 Too Slow?

We are running a Dell PowerEdge T710 with a PERC H200 RAID controller and two mirrored SAS drives. We just patched to Update 2 because our SAS drives were extremely slow and it mentioned somewhere ...
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3answers
26k views

SAS vs. Nearline/MDL SAS - What is the difference?

As subject I guess, looking at SAN's and most vendors offer 10k or 15k "proper" SAS drives, many also offer 7.2k MDL/Nearline SAS drives. Does anyone have an authoritative explanation of the ...
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5answers
119 views

source for enterprise disks [closed]

whats your source for scsi/sas disks - to replace breakage or expand existing systems? the usual suspects (newegg, pricewatch, ZZF) seem to have limited selection.
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2answers
108 views

spontaneous hard disk password

I had an HP proliant server go down recently. All of the sudden the sas controller (e200i) would not see any of the physical disks. New disks were detected just fine. I thought it was odd that all ...
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1answer
288 views

IO/s and MB throughput for Various RAID Arrays

Are there any resources that have typical throughput and IOp/s for various RAID arrays under sequential and random patterns? In my case I am more specifically interested in at the moment: 6 Disk ...
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2answers
1k views

SSD seems dead after wakeup from Windows Sleep, BIOS stalls but doesn't find it anymore

The morning, the following scary scenario happened: I woke up my Windows system Typed in my username and got an error (something like "could not load security xxx", but unsure of exact wording) ...
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2answers
5k views

SAS to SATA adapter?

Is it possible to have a SAS to SATA. e.g the server has SAS onboard, and I want to use SATA drives instead of the SAS ones (cheaper and easier to source here in Australia). They have cables on this ...
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4answers
646 views

Stripe and block size for a RAID0 array

I'm looking for a recommendation on block size and RAID0 stripe size. We have a RAID0 array consisting of six SAS drives. The array is a workspace for SAS programs (I know, the various SAS ...
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3answers
2k views

Dell SAS 5/ir - secondary disk update “data will be lost!” - will all data, or just secondary disk?

On a Dell SAS 5/ir RAID controller, I have a RAID 1 array which is Degraded. One drive has failed. Upon replacing this drive the controller doesn't automatically resync the array. There's an ...
3
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1answer
208 views

Are PCIe v2 RAID controllers backward compatible with PCIe V1?

I am looking to add a PCIe V.2 RAID controller (LSI SAS 9280-4i4e) to an older Intel server (SR2500) which has PCIe V.1 slots. Does anyone have any experience with using RAID controllers designed for ...
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1answer
361 views

HP DL180 and External SAS Tape Backup Drive

Is is possible to use the following PCI-E card with a HP DL180 server (specifically the 487507-371 model) - HP 4x Internal/4x External SAS PCI-E Adapter (416096-B2). If not what are the options for ...
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1answer
349 views

Is mismatched firmware on drives in a raid-6 a bad thing?

I recently expanded a raid-1 to a raid-6 with six drives. I ordered all four of the new drives from the same place, and all of them were advertised to be the same drives as the original two--Seagate ...
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3answers
662 views

Enterprise Tape Backup solutions

I'm currently attempting to re-architect a backup solution where I'm working. We've got 2 NAS devices, one in the office, one in the datacentre. The servers in the DC back up to the DC NAS, which ...
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2answers
1k views

What is a Linux device name for RAID of sas drives?

I have a RAID1 using Promise FastTrack TX2650 consisting of 2 SAS drives. What is a Linux device name for them? Like sda is for first sata drive. I have Windows server so I can't look it directly but ...
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1answer
1k views

Improving SAS multipath to JBOD performance on Linux

I'm trying to optimize a storage setup on some Sun hardware with Linux. Any thoughts would be greatly appreciated. We have the following hardware: Sun Blade X6270 2* LSISAS1068E SAS controllers 2* ...
1
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1answer
678 views

External mini SAS to external mini SAS (x4 vs x8)?

I'm ordering an Enhance Tec E8 external harddrive enclosure with with a Mini SAS 8088 connector. I plan to use 8 drives in a RAID 5. The RAID Controller I'm looking at says it has 2 x4/x8 hybrid ...
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1answer
724 views

Does vmWare ESXi 4.0 U1 support the Promise SuperTrak EX8650 SATA card?

can anyone tell me if vmWare ESXi 4.0 U1 has support for the Promise SuperTrak EX8650 SATA card? In the hardware support guide I find that VmWare should have support for the Promise SuperTrak EX8650 ...
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7answers
22k views

SCSI vs SATA? Is SCSI “actually” better? [closed]

Well, I was talking with a guy about servers the other day. I was a bit shocked whenever I asked him if there was any significant difference between SCSI and SATA and why he always uses SCSI. (note, ...
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6answers
2k views

sata and sas on the same machine

I know you can't mix SATA and SAS in the same RAID configuration, but is it possible to mount a SATA drive on the same RAID controller as its own logical drive? If not, what do I need in order to ...
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4answers
9k views

Performance differences between 2.5“ vs. 3.5” SAS

What real performance gains/losses are there on 2.5" vs. 3.5" 15k SAS drives. Are folks really seeing seek differences, &c?
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4answers
653 views

ZFS server hardware questions

I'm a photographer by trade and I've yet to find a method I'm happy with for archiving my work. Currently I'm looking at building a NAS server using OpenSolaris, so I can use ZFS. That way I can take ...
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2answers
773 views

Dell SAS controllers & Hyper-V

Does anyone have any experience with the Dell SAS 5/iR and the SAS 6/iR controllers? We are looking at virtualizing 5 of our servers and would like to hear about any experiences using either of these ...
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2answers
2k views

Does anyone know if “SATA II” drives are compatible with a Dell SAS 5i/R?

I want to buy some cheaper HDs for our server (it will have practically zero HD access) but I plan to put them into a RAID 1 config, just for peace of mind. Our server is a second-hand PowerEdge 860, ...
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2answers
3k views

Solaris Multipathed I/O - Physically Removing a Disk

I am a Solaris newbie. I have a Solaris 10u8 machine that is running an attached J4400 and some internal drives. We're using multipathed SAS I/O (stmsboot; mpathadm), so the device mount points have ...
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1answer
986 views

Cascading HP StorageWorks MSA60 and MSA50

We currently have a cascade of two MSA50 arrays connected to a P600 controller. Is it possible to add a MSA60 array to the cascade? HP documentation states that MSA60 is compatible with P600.
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6answers
2k views

“Raid 0 SAS” versus “2nd generation SSD”

i was planning to buy a SAS system made of two 15k RPM disks in Raid 0 configuration to give a boost to my s.o. and my apps... but after i saw that article on Coding Horror, i've started to thinking ...
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2answers
1k views

Is it possible to run LSI SAS 9211-8i PCI-E 8 in PCI-E 16 Slot?

I just bought an LSI SAS 9211-8i HBA(Host bus adapter) to use with my new hardware. I realized after looking at the card that it required an x8 slot and my new mobo only x16 available. I keep on ...
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2answers
290 views

How many disks to use for eight channel RAID controller

I have a 3ware 8 channel SAS controller and a back plane extender (also 8 channel) which can take 16 drives. I will be creating a single RAID 10 volume. I know that adding more drives has positive ...
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5answers
1k views

Unable to boot with Windows 2008 DVD / USB Key

I am trying to install Windows 2008 server on a HP Proliant DL180 G5. There is no built-in DVD reader so I need to use my LaCie USB one. When I put the CD in and boot from the USB DVD on the server, ...
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1answer
652 views

SAS Array with or without expander

Is it better to use a SAS Expander backplane for 12 drives via one SAS connection or is it better to use a SAS backplane with 3 SAS connections? This is in terms of performance, rather than expansion. ...
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2answers
2k views

connecting SATA SSDs to SAS

Is there any performance loss when connecting a SATA SSD to a SAS controller? Edit: Assume the controller doesn't have SATA connectors and I use a SATA to SAS interposer. Will there be any performance ...