Combining SDA and SDB
Solution 1
The hdparm
outputs clearly shows that you have 2 ssd-s in your laptop. So I decided to search for the specifications of your laptop, and there is no mystery, you have the Asus UX31LA-C4018H version, which comes with 2x128 GB SSD-s. See for example here
If you still want to combine the drives then you should use LVM. Please see this Q&A for more info on setting up an LVM.
Solution 2
http://www.computerbase.de/artikel/notebooks/2013/asus-zenbook-ux301-im-test/ shows the configuration of your Zenbook is, indeed, two each 128GB SSDs. Therefore, I would set up Ubuntu to use sda for the operating system and programs (root) as well as the swap partition. Then, create a new partition using all of sdb as /home and that's where your data will go.
The original configuration, RAID0, gives more speed (good for poky ol' Windoze), but less reliability.
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JLee
Updated on September 18, 2022Comments
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JLee over 1 year
I recently purchased a laptop to install ubuntu onto. From my understanding, there is 1 SSD inside with a size of 256GB. However, upon attempting to install ubuntu, I am given two partitions, SDA and SDB of equal size.
If I install on SDA will that limit my "total" size of ubuntu to 128 GB? How do I combine the two to use a total size of 256 GB?
Am I wrong in assuming that there is 1 SSD of size 256?
Thank you.
@falconer's request
/dev/sda: ATA device, with non-removable media Model Number: SanDisk SD6SP1M128G1002 Serial Number: 132254401865 Firmware Revision: X231202 Media Serial Num: Media Manufacturer: Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0 Standards: Used: unknown (minor revision code 0x0028) Supported: 8 7 6 5 Likely used: 8 Configuration: Logical max current cylinders 16383 16383 heads 16 16 sectors/track 63 63 -- CHS current addressable sectors: 16514064 LBA user addressable sectors: 250069680 LBA48 user addressable sectors: 250069680 Logical Sector size: 512 bytes Physical Sector size: 512 bytes Logical Sector-0 offset: 0 bytes device size with M = 1024*1024: 122104 MBytes device size with M = 1000*1000: 128035 MBytes (128 GB) cache/buffer size = unknown Nominal Media Rotation Rate: Solid State Device Capabilities: LBA, IORDY(can be disabled) Queue depth: 32 Standby timer values: spec'd by Standard, no device specific minimum R/W multiple sector transfer: Max = 1 Current = 1 Advanced power management level: 128 DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns Commands/features: Enabled Supported: * SMART feature set Security Mode feature set * Power Management feature set * Write cache * Look-ahead * Host Protected Area feature set * WRITE_BUFFER command * READ_BUFFER command * DOWNLOAD_MICROCODE * Advanced Power Management feature set SET_MAX security extension * 48-bit Address feature set * Device Configuration Overlay feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART error logging * SMART self-test * General Purpose Logging feature set * 64-bit World wide name * WRITE_UNCORRECTABLE_EXT command * {READ,WRITE}_DMA_EXT_GPL commands * Segmented DOWNLOAD_MICROCODE * Gen1 signaling speed (1.5Gb/s) * Gen2 signaling speed (3.0Gb/s) * Gen3 signaling speed (6.0Gb/s) * Native Command Queueing (NCQ) * Host-initiated interface power management * Phy event counters * READ_LOG_DMA_EXT equivalent to READ_LOG_EXT * DMA Setup Auto-Activate optimization Device-initiated interface power management * Software settings preservation * Device Sleep (DEVSLP) * Data Set Management TRIM supported (limit 16 blocks) * Deterministic read ZEROs after TRIM Security: Master password revision code = 65534 supported not enabled not locked frozen not expired: security count supported: enhanced erase 2min for SECURITY ERASE UNIT. 12min for ENHANCED SECURITY ERASE UNIT. Logical Unit WWN Device Identifier: 5001b449d68f0149 NAA : 5 IEEE OUI : 001b44 Unique ID : 9d68f0149 Checksum: correct Device Sleep: DEVSLP Exit Timeout (DETO): 20 ms (drive) Minimum DEVSLP Assertion Time (MDAT): 10 ms (drive) /dev/sdb: ATA device, with non-removable media Model Number: SanDisk SD6SP1M128G1002 Serial Number: 132254404902 Firmware Revision: X231202 Media Serial Num: Media Manufacturer: Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0 Standards: Used: unknown (minor revision code 0x0028) Supported: 8 7 6 5 Likely used: 8 Configuration: Logical max current cylinders 16383 16383 heads 16 16 sectors/track 63 63 -- CHS current addressable sectors: 16514064 LBA user addressable sectors: 250069680 LBA48 user addressable sectors: 250069680 Logical Sector size: 512 bytes Physical Sector size: 512 bytes Logical Sector-0 offset: 0 bytes device size with M = 1024*1024: 122104 MBytes device size with M = 1000*1000: 128035 MBytes (128 GB) cache/buffer size = unknown Nominal Media Rotation Rate: Solid State Device Capabilities: LBA, IORDY(can be disabled) Queue depth: 32 Standby timer values: spec'd by Standard, no device specific minimum R/W multiple sector transfer: Max = 1 Current = 1 Advanced power management level: 128 DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns Commands/features: Enabled Supported: * SMART feature set Security Mode feature set * Power Management feature set * Write cache * Look-ahead * Host Protected Area feature set * WRITE_BUFFER command * READ_BUFFER command * DOWNLOAD_MICROCODE * Advanced Power Management feature set SET_MAX security extension * 48-bit Address feature set * Device Configuration Overlay feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART error logging * SMART self-test * General Purpose Logging feature set * 64-bit World wide name * WRITE_UNCORRECTABLE_EXT command * {READ,WRITE}_DMA_EXT_GPL commands * Segmented DOWNLOAD_MICROCODE * Gen1 signaling speed (1.5Gb/s) * Gen2 signaling speed (3.0Gb/s) * Gen3 signaling speed (6.0Gb/s) * Native Command Queueing (NCQ) * Host-initiated interface power management * Phy event counters * READ_LOG_DMA_EXT equivalent to READ_LOG_EXT * DMA Setup Auto-Activate optimization Device-initiated interface power management * Software settings preservation * Device Sleep (DEVSLP) * Data Set Management TRIM supported (limit 16 blocks) * Deterministic read ZEROs after TRIM Security: Master password revision code = 65534 supported not enabled not locked frozen not expired: security count supported: enhanced erase 2min for SECURITY ERASE UNIT. 12min for ENHANCED SECURITY ERASE UNIT. Logical Unit WWN Device Identifier: 5001b449d68f0d26 NAA : 5 IEEE OUI : 001b44 Unique ID : 9d68f0d26 Checksum: correct Device Sleep: DEVSLP Exit Timeout (DETO): 20 ms (drive) Minimum DEVSLP Assertion Time (MDAT): 10 ms (drive)
@RPiAwesomeness
As you can see, /dev/sda is in the top right corner in the drop down menu, /dev/sdb can be accessed from there as well.
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RPiAwesomeness over 10 yearsWhat is the make/model of your computer? Basically, installing to SDA won't limit your Ubuntu installation. You can always put files on SDB. However, you can also, so long as there are no files or any Windows installations you wish to keep intact, just combine the two partitions to give Ubuntu the entire 256GB of space. I can go more into depth in an answer if we get more info.
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Rmano over 10 yearsThat's quite strange. If he has
sda
andsdb
he system is showing two drives, not one (otherwise he will have a couple partitions,sda1
andsda2
. Maybe some sort of (evil) predefined RAID? -
JLee over 10 years@RPiAwesomeness The make/model is Asus UX31LA. The problem I'm having is that the two are completely separate. I'm not planning on having anything else on their beyond Ubuntu
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RPiAwesomeness over 10 yearsAh, Well, this makes it easier to answer. IMO that's a nice laptop. Anyways, it indeed comes with one (1) 256 GB SSD or one (1) 128GB SSD, not two of any type so it must be partitioned. I will post an answer with instructions on how to combine partitions so you can have one large 256GB partition to install Ubuntu on (you would do this via the LiveCD/LiveUSB.)
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RPiAwesomeness over 10 years@Rmano Good point. There should only be
sda
notsda
andsdb
... the model should have only one SSD, not two. I'm thinking you may be right. Any input?
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